* MPC5200B SPI PSC3 Problem
@ 2006-06-07 22:21 Trueskew
2006-06-08 16:04 ` John Rigby
0 siblings, 1 reply; 6+ messages in thread
From: Trueskew @ 2006-06-07 22:21 UTC (permalink / raw)
To: linuxppc-embedded
[-- Attachment #1: Type: text/plain, Size: 10899 bytes --]
We have an AIC26 codec connected to our Lite5200B platform via J21. I've
used MPC5200BUG to configure PSC3 as an SPI master, along with some samples
I've found online (including here) and some I received from Freescale.
Although the transfers seem to be working as expected (please see the output
file at the end of this message), I get only 0xffff back. This occurs
whether or not the device is attached to J21. A scope shows that PSC3_8
(SPI_SS) and PSC3_9 (SPI_CLK) are low at all times, and I'm concerned I'm
still doing something wrong with respect to enabling SPI over PSC3.
I'm including my driver initialization code, my write code, and output
showing the write behavior. If someone could comment on it, I would greatly
appreciate it... or if someone flat out has code to do this, I'd be happy to
take it from you. I've seen a few variations, but whether I use them
directly or modify them as I need to, I can't seem to get past this. Of
course, any other suggestions are welcome.
Thanks.
Sal
---------------------------------------------------------------------------
Initialization Code
---------------------------------------------------------------------------
#define GPIO_PSC3_PORT_CONFIG_MASK 0x00000f00
#ifdef SPI_USE_MCLK
#define GPIO_PSC3_PORT_CONFIG 0x00000700 /* PSC3 mode with mclk */
#else /* SPI_USE_MCLK */
#define GPIO_PSC3_PORT_CONFIG 0x00000600 /* PSC3 mode */
#endif /* SPI_USE_MCLK */
#define CDM_PSC3_MCLK_ENABLE 0x00000080
#define CDM_PSC3_MCLK_CONFIG 0x8020 /* Divide Fvco ftom 528 to
16Mhz */
#define PSC3_SICR_REG_VALUE 0x0280f000 /* 16-bit select Codec SPI
master mode, msb first,
UseEOF=1. GenClk=1, SIM,
CPOL and CPHA are
function input */
...
/* Select the Pin-Muxing for PSC3 Codec mode */
gpio = (struct mpc52xx_gpio *) ioremap(MPC52xx_GPIO,
sizeof(struct mpc52xx_gpio));
if(gpio)
{
port_config = gpio->port_config;
port_config &= ~GPIO_PSC3_PORT_CONFIG_MASK;
port_config |= GPIO_PSC3_PORT_CONFIG;
gpio->port_config = port_config;
iounmap(gpio);
}
else
{
return(-1);
}
#ifdef SPI_USE_MCLK
/* PSC clock enable */
g_pCDM->clk_enables |= CDM_PSC3_MCLK_ENABLE;
g_pCDM->mclken_div_psc3 = CDM_PSC3_MCLK_CONFIG;
#endif /* SPI_USE_MCLK */
/* Disable rx and tx */
g_pPSC->command = MPC52xx_PSC_RST_RX;
g_pPSC->command = MPC52xx_PSC_RST_TX;
g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
g_pPSC->command = MPC52xx_PSC_RX_DISABLE | MPC52xx_PSC_TX_DISABLE;
g_pPSC->mode = 0;
g_pPSC->sicr = PSC3_SICR_REG_VALUE;
#ifdef SPI_USE_MCLK
g_pPSC->ccr=0x0703; /* set SCK and DSCKL delay */
#else /* SPI_USE_MCLK */
g_pPSC->ccr=0x0003; /* set SCK and DSCKL delay must be > 2 */
#endif /* SPI_USE_MCLK */
g_pPSC->ctur=0x00; /* Set DTL delay 2us */
g_pPSC->ctlr=0x84;
g_pPSC->rfalarm=100; /* Alarm values taken from SPI example sample
*/
g_pPSC->tfalarm=1;
g_pPSC->rfcntl &= 0xf8; /* 0 byte granularity */
g_pPSC->tfcntl = 1;
/* Enable rx & tx */
g_pPSC->command = MPC52xx_PSC_RST_RX;
g_pPSC->command = MPC52xx_PSC_RST_TX;
g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
---------------------------------------------------------------------------
Write code
---------------------------------------------------------------------------
static int mpc52xx_spi_transfer(u16 *p_usBuffer, u16 p_usCount)
{
u16 usIndex, usTemp;
printk("------------------------------------------------------\n");
printk("Entry: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
g_pPSC->command = MPC52xx_PSC_RST_RX;
g_pPSC->command = MPC52xx_PSC_RST_TX;
g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
printk("TX-RX Enable: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
/* Clean out the read FIFO */
usIndex = 0;
while(g_pPSC->mpc52xx_psc_status & MPC52xx_PSC_SR_RXRDY)
{
usTemp = g_pPSC->mpc52xx_psc_buffer_16;
printk("Flushing Rx FIFO: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
udelay(100000);
udelay(100000);
udelay(100000);
udelay(100000);
udelay(100000);
usIndex++;
if(usIndex == 10) return(-1);
}
/* Send out the buffer */
g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_DISABLE;
for(usIndex=0; usIndex<p_usCount; usIndex++)
{
printk("Sending %04x: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
p_usBuffer[usIndex],
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
g_pPSC->mpc52xx_psc_buffer_16 = p_usBuffer[usIndex];
printk("Sent: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
}
g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
usTemp = 0;
while(g_pPSC->tfnum)
{
printk("TFNUM Wait: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
udelay(100000);
udelay(100000);
udelay(100000);
udelay(100000);
udelay(100000);
usTemp++;
if(usTemp == 10) return(-1);
};
printk("TxRDY: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
for(usIndex=0; usIndex<p_usCount; usIndex++)
{
usTemp = 0;
while(!(g_pPSC->mpc52xx_psc_status & MPC52xx_PSC_SR_RXRDY))
{
printk("RxRDY Wait: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
udelay(100000);
udelay(100000);
udelay(100000);
udelay(100000);
udelay(100000);
usTemp++;
if(usTemp == 10) return(-1);
};
printk("RxRDY: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
p_usBuffer[usIndex] = g_pPSC->mpc52xx_psc_buffer_16;
printk(" Received %04x\n", p_usBuffer[usIndex]);
}
printk("EXIT: psc=%x status=%04x tfstat=%04x rfstat=%04x
mode=%02x\n tfnum %3d rfnum %3d\n",
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
g_pPSC->tfnum, g_pPSC->rfnum);
return(usIndex);
}
---------------------------------------------------------------------------
Output
---------------------------------------------------------------------------
The lines below are a capture of register settings from my driver,
along with output lines when trying to write 16 bit words to our
device. This output is consistent whether the device is connected
or not (via J21). Basic operation, delimited by "------...---":
- Disable TX, Enable RX (despite the "TX-RX Enable" heading)
- Send word 1
- Send word 2
- Enable TX, Enable RX
- Wait for tfnum == 0
- Receive data
port_config=91051624 sicr=0280f000 clk_enables=00ffffff div_psc3=800f
------------------------------------------------------
Entry: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
tfnum 0 rfnum 0
TX-RX Enable: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
tfnum 0 rfnum 0
Sending 0880: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 0
Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
tfnum 2 rfnum 0
Sending bb00: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
tfnum 2 rfnum 0
Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
tfnum 4 rfnum 0
TFNUM Wait: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
tfnum 2 rfnum 0
TxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 4
RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 4
Received ffff
RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 2
Received ffff
EXIT: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 0
------------------------------------------------------
Entry: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 0
TX-RX Enable: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
tfnum 0 rfnum 0
Sending 8820: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 0
Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
tfnum 2 rfnum 0
Sending 0000: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
tfnum 2 rfnum 0
Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
tfnum 4 rfnum 0
TFNUM Wait: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
tfnum 2 rfnum 0
TxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 4
RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 4
Received ffff
RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 2
Received ffff
EXIT: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
tfnum 0 rfnum 0
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: MPC5200B SPI PSC3 Problem
2006-06-07 22:21 Trueskew
@ 2006-06-08 16:04 ` John Rigby
2006-06-08 16:11 ` John Rigby
0 siblings, 1 reply; 6+ messages in thread
From: John Rigby @ 2006-06-08 16:04 UTC (permalink / raw)
To: Trueskew; +Cc: linuxppc-embedded
[-- Attachment #1: Type: text/plain, Size: 12350 bytes --]
There seems to be a conflict between two sections of the 5200 User manual.
In section 7.3 where port_config is documented the PSC3 configuration
bits (20:23)
defined as:
0000 = All PSC3 pins are GPIOs
0001 = USB2 on PSC3, no GPIOs available, see Note 3
001X = Reserved
0100 = UART functionality without CD
0101 = UARTe functionality with CD
0110 = CODEC3 functionality
0111 = CODEC3 functionality (with MCLK)
100X = SPI
101X = Reserved
1100 = SPI with UART3
1101 = SPI with UART3e
111X = SPI with CODEC3
but in the psc chapter in table 15-85 it says to set port config to
0x00000600 but
the description says "Select the Pin-Muxing for PSC3 Codec mode"
It appears that table 15-85 is wrong.
I have attached some spi code that is embedded in a touchscreen
driver. It might be helpful.
On 6/7/06, Trueskew <trueskew@gmail.com> wrote:
>
>
> We have an AIC26 codec connected to our Lite5200B platform via J21. I've
> used MPC5200BUG to configure PSC3 as an SPI master, along with some samples
> I've found online (including here) and some I received from Freescale.
> Although the transfers seem to be working as expected (please see the output
> file at the end of this message), I get only 0xffff back. This occurs
> whether or not the device is attached to J21. A scope shows that PSC3_8
> (SPI_SS) and PSC3_9 (SPI_CLK) are low at all times, and I'm concerned I'm
> still doing something wrong with respect to enabling SPI over PSC3.
>
> I'm including my driver initialization code, my write code, and output
> showing the write behavior. If someone could comment on it, I would greatly
> appreciate it... or if someone flat out has code to do this, I'd be happy to
> take it from you. I've seen a few variations, but whether I use them
> directly or modify them as I need to, I can't seem to get past this. Of
> course, any other suggestions are welcome.
>
> Thanks.
> Sal
>
> ---------------------------------------------------------------------------
> Initialization Code
> ---------------------------------------------------------------------------
> #define GPIO_PSC3_PORT_CONFIG_MASK 0x00000f00
> #ifdef SPI_USE_MCLK
> #define GPIO_PSC3_PORT_CONFIG 0x00000700 /* PSC3 mode with mclk */
> #else /* SPI_USE_MCLK */
> #define GPIO_PSC3_PORT_CONFIG 0x00000600 /* PSC3 mode */
> #endif /* SPI_USE_MCLK */
>
> #define CDM_PSC3_MCLK_ENABLE 0x00000080
> #define CDM_PSC3_MCLK_CONFIG 0x8020 /* Divide Fvco ftom 528 to
> 16Mhz */
>
> #define PSC3_SICR_REG_VALUE 0x0280f000 /* 16-bit select Codec SPI
> master
> mode, msb first,
> UseEOF=1.
> GenClk=1, SIM,
> CPOL and
> CPHA are
> function
> input */
> ...
> /* Select the Pin-Muxing for PSC3 Codec mode */
> gpio = (struct mpc52xx_gpio *) ioremap(MPC52xx_GPIO,
> sizeof(struct mpc52xx_gpio));
> if(gpio)
> {
> port_config = gpio->port_config;
> port_config &= ~GPIO_PSC3_PORT_CONFIG_MASK;
> port_config |= GPIO_PSC3_PORT_CONFIG;
> gpio->port_config = port_config;
> iounmap(gpio);
> }
> else
> {
> return(-1);
> }
>
> #ifdef SPI_USE_MCLK
> /* PSC clock enable */
> g_pCDM->clk_enables |= CDM_PSC3_MCLK_ENABLE;
> g_pCDM->mclken_div_psc3 = CDM_PSC3_MCLK_CONFIG;
> #endif /* SPI_USE_MCLK */
>
> /* Disable rx and tx */
> g_pPSC->command = MPC52xx_PSC_RST_RX;
> g_pPSC->command = MPC52xx_PSC_RST_TX;
> g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> g_pPSC->command = MPC52xx_PSC_RX_DISABLE | MPC52xx_PSC_TX_DISABLE;
>
> g_pPSC->mode = 0;
> g_pPSC->sicr = PSC3_SICR_REG_VALUE;
>
> #ifdef SPI_USE_MCLK
> g_pPSC->ccr=0x0703; /* set SCK and DSCKL delay */
> #else /* SPI_USE_MCLK */
> g_pPSC->ccr=0x0003; /* set SCK and DSCKL delay must be > 2 */
> #endif /* SPI_USE_MCLK */
>
> g_pPSC->ctur=0x00; /* Set DTL delay 2us */
> g_pPSC->ctlr=0x84;
>
> g_pPSC->rfalarm=100; /* Alarm values taken from SPI example sample
> */
> g_pPSC->tfalarm=1;
>
> g_pPSC->rfcntl &= 0xf8; /* 0 byte granularity */
> g_pPSC->tfcntl = 1;
>
> /* Enable rx & tx */
> g_pPSC->command = MPC52xx_PSC_RST_RX;
> g_pPSC->command = MPC52xx_PSC_RST_TX;
> g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
>
> ---------------------------------------------------------------------------
> Write code
> ---------------------------------------------------------------------------
> static int mpc52xx_spi_transfer(u16 *p_usBuffer, u16 p_usCount)
> {
> u16 usIndex, usTemp;
>
>
> printk("------------------------------------------------------\n");
> printk("Entry: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> g_pPSC->command = MPC52xx_PSC_RST_RX;
> g_pPSC->command = MPC52xx_PSC_RST_TX;
> g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
> printk("TX-RX Enable: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
>
> /* Clean out the read FIFO */
> usIndex = 0;
> while(g_pPSC->mpc52xx_psc_status & MPC52xx_PSC_SR_RXRDY)
> {
> usTemp = g_pPSC->mpc52xx_psc_buffer_16;
> printk("Flushing Rx FIFO: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> usIndex++;
> if(usIndex == 10) return(-1);
> }
>
> /* Send out the buffer */
> g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_DISABLE;
> for(usIndex=0; usIndex<p_usCount; usIndex++)
> {
> printk("Sending %04x: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
> p_usBuffer[usIndex],
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> g_pPSC->mpc52xx_psc_buffer_16 = p_usBuffer[usIndex];
> printk("Sent: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> }
> g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
> usTemp = 0;
> while(g_pPSC->tfnum)
> {
> printk("TFNUM Wait: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> usTemp++;
> if(usTemp == 10) return(-1);
> };
> printk("TxRDY: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> for(usIndex=0; usIndex<p_usCount; usIndex++)
> {
> usTemp = 0;
> while(!(g_pPSC->mpc52xx_psc_status &
> MPC52xx_PSC_SR_RXRDY))
> {
> printk("RxRDY Wait: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> udelay(100000);
> usTemp++;
> if(usTemp == 10) return(-1);
> };
> printk("RxRDY: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> p_usBuffer[usIndex] = g_pPSC->mpc52xx_psc_buffer_16;
> printk(" Received %04x\n", p_usBuffer[usIndex]);
> }
>
> printk("EXIT: psc=%x status=%04x tfstat=%04x rfstat=%04x
> mode=%02x\n tfnum %3d rfnum %3d\n",
>
> (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> g_pPSC->tfnum, g_pPSC->rfnum);
> return(usIndex);
> }
>
>
> ---------------------------------------------------------------------------
> Output
> ---------------------------------------------------------------------------
> The lines below are a capture of register settings from my driver,
> along with output lines when trying to write 16 bit words to our
> device. This output is consistent whether the device is connected
> or not (via J21). Basic operation, delimited by "------...---":
>
> - Disable TX, Enable RX (despite the "TX-RX Enable" heading)
> - Send word 1
> - Send word 2
> - Enable TX, Enable RX
> - Wait for tfnum == 0
> - Receive data
>
> port_config=91051624 sicr=0280f000 clk_enables=00ffffff div_psc3=800f
> ------------------------------------------------------
> Entry: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> tfnum 0 rfnum 0
> TX-RX Enable: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> tfnum 0 rfnum 0
> Sending 0880: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 0
> Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> tfnum 2 rfnum 0
> Sending bb00: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> tfnum 2 rfnum 0
> Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> tfnum 4 rfnum 0
> TFNUM Wait: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> tfnum 2 rfnum 0
> TxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 4
> RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 4
> Received ffff
> RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 2
> Received ffff
> EXIT: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 0
> ------------------------------------------------------
> Entry: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 0
> TX-RX Enable: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> tfnum 0 rfnum 0
> Sending 8820: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 0
> Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> tfnum 2 rfnum 0
> Sending 0000: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> tfnum 2 rfnum 0
> Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> tfnum 4 rfnum 0
> TFNUM Wait: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> tfnum 2 rfnum 0
> TxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 4
> RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 4
> Received ffff
> RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 2
> Received ffff
> EXIT: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> tfnum 0 rfnum 0
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
>
[-- Attachment #2: mpc5200_ts_spi.c --]
[-- Type: text/plain, Size: 6172 bytes --]
/*
* Media5200 touchscreen driver
*
* Copyright (c) 2006 Freescale
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
/*
File : mpc5200_ts_spi.c
Summary : touchscreen spi driver
*/
#include "mpc5200_ts_spi.h"
#include "asm/io.h"
/**************** Public functions ****************/
/*
Initialize and configure spi
- configure mux port on psc3
- configure spi mode
- configure spi baud rate
*/
int spi_init (void)
{
struct mpc52xx_gpio __iomem *gpio;
struct mpc52xx_intr __iomem *intr;
/* Map zones */
gpio = ioremap(MPC52xx_PA(MPC52xx_GPIO_OFFSET), MPC52xx_GPIO_SIZE);
intr = ioremap(MPC52xx_PA(MPC52xx_INTR_OFFSET), MPC52xx_INTR_SIZE);
if (!gpio || !intr) {
printk(KERN_ERR __FILE__ ": "
"Error while mapping GPIO/INTR during "
"spi_init\n");
goto unmap_regs;
}
SPI_Config_T spi_config; /* spi configuration */
PDEBUG3("spin_init: initializing SPI in spi_init()\n");
/* enable interrupt */
intr->per_mask &= INTR_PER_MASK_SPI_OFF;
/* initialize mux port PSC3 to SPI */
gpio->port_config |= GPIO_CONFIG_PORT_SPI_MASK;
/* initialze data structure */
SPI_Regs = (SPI_Regs_T *)(SPI_BASE_ADDRESS);
memset(&spi_config, 0, sizeof(SPI_Config_T));
/* set spi config attributes */
spi_config.SPI_Master = SPI_MASTER_DEFAULT;
spi_config.ClockPolarity = SPI_CPOL_DEFAULT;
spi_config.ClockPhase = SPI_CPHA_DEFAULT;
spi_config.WiredOR = SPI_WOR_DEFAULT;
spi_config.SSoutput = SPI_SSOE_DEFAULT;
spi_config.SPI_Enable = SPI_SPE_DEFAULT;
spi_config.BaudRate = SPI_BAUD_DEFAULT;
/* modify according to touchscreen driver spi config */
spi_config.ClockPolarity = 0;
spi_config.ClockPhase = 0 ;
spi_config.WiredOR = 0;
/*Set the SS pin to low by set SPIPORT register*/
SPI_Regs->SPIPORT = 0x00;
/* now initialize the spi hardware */
SPI_SetConfig(&spi_config);
/* Unmap reg zone */
unmap_regs:
if (gpio) iounmap(gpio);
if (intr) iounmap(intr);
return (TS_OK);
}
/* assume *buffer already alocated to be at least nbytes long */
int read_spi(u8 *buffer, u32 nbytes)
{
int i;
for (i = 0; i < nbytes; i++) {
buffer[i] = ReadRegister(SPI_Regs->SPIDR);
} /* for */
return (nbytes);
} /* read_spi */
int write_spi( u8 *buffer, u32 nbytes)
{
u32 len;
u8 reg_value;
// Move this to one devctl command
// SPI_Regs->SPIPORT = 0x00;
for ( len = 0; len < nbytes; len++ )
{
PDEBUG9("in write_spi: buffer = %x\n", *buffer);
WriteRegister(SPI_Regs->SPIDR,*buffer);
/* Wait several nanoseconds and then check the WCOL flag in status
* register. WeiWei systest replace it with the for-loop directly
*/
// WAIT(NANOSECS_PER_WRITE);
while(1)
{
reg_value = ReadRegister(SPI_Regs->SPISR);
if (reg_value & SPI_WCOL)
{
WriteRegister(SPI_Regs->SPIDR,*buffer);
continue;
}
if ( reg_value & SPI_SPIF )
break;
}
//SPI_Isr();
buffer++;
}
/* WeiWei add : hardware team suggestion, but it is optional */
// SPI_Regs->SPIPORT = 0x08;
return len;
}
/*************** Private functions ********************/
static int SPI_SetConfig(SPI_Config_T * Config_Ptr )
{
u8 control_reg = 0x00;
/* initialize direction register for SPI */
WriteRegister ( SPI_Regs->SPIDDR, 0x0e );
/* Set Baud Rate */
if(SPI_SetBaudrate( Config_Ptr -> BaudRate) == TS_ERROR )
{
PDEBUG3("SPI_SetConfig: Error in Set baudrate \n");
WriteRegister(SPI_Regs->SPICR1, control_reg | SPI_SPE);
return TS_ERROR;
}
/* aways master */
control_reg |= SPI_MASTER_MODE;
/* The SSOE for master mode */
control_reg &= ~SPI_SSOE;
if(Config_Ptr -> ClockPolarity)
control_reg |= SPI_CPOL;
else
control_reg &= ~SPI_CPOL;
if(Config_Ptr -> ClockPhase)
control_reg |= SPI_CPHA;
else
control_reg &= ~SPI_CPHA;
if(Config_Ptr -> WiredOR)
control_reg |= SPI_SPWOM;
else
control_reg &= ~SPI_SPWOM;
/* always enable SPI */
control_reg |= SPI_SPE;
/* Enable the interrupt and set the register : WeiWei systest */
WriteRegister(SPI_Regs->SPICR1, control_reg | SPI_SPIE );
PDEBUG3("SPI_SetCconfig : SPICR1 =%x \n",SPI_Regs->SPICR1);
return TS_OK ;
}
static int SPI_SetBaudrate(u32 BaudRate)
{
int i;
u16 clockdivisor;
/* Compute the Clock Divisor from module clock divided by BaudRate */
clockdivisor = SPI_MODULE_CLOCK/BaudRate;
/* Find the value of the Baud Rate Register from the array.
* If no accurate value can be found, select the closest one
*/
for (i = 0; i < SPI_DIVISOR_NUM-1; i++)
{
if(( clockdivisor >= Clock_Divisor[i].clockdivisor ) && \
( clockdivisor < Clock_Divisor[i+1].clockdivisor))
{
u16 middle;
middle = (Clock_Divisor[i].clockdivisor + \
Clock_Divisor[i+1].clockdivisor)/2;
if ( clockdivisor <= middle ) {
WriteRegister(SPI_Regs->SPIBR, \
Clock_Divisor[i].reg_value);
PDEBUG3("SPI_SetBaudrate: Baudrate %d\n", SPI_MODULE_CLOCK/Clock_Divisor[i].clockdivisor);
} else {
WriteRegister(SPI_Regs->SPIBR, \
Clock_Divisor[i+1].reg_value);
PDEBUG3("SPI_SetBaudrate: Baudrate %d\n", SPI_MODULE_CLOCK/Clock_Divisor[i+1].clockdivisor);
}
return TS_OK;
}
}
if ( clockdivisor == Clock_Divisor[i].clockdivisor )
{
WriteRegister(SPI_Regs->SPIBR, Clock_Divisor[i].reg_value);
PDEBUG3("SPI_SetBaudrate: Exact Baudrate %d\n", SPI_MODULE_CLOCK/clockdivisor);
return TS_OK;
}
else
return TS_ERROR;
}
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: MPC5200B SPI PSC3 Problem
2006-06-08 16:04 ` John Rigby
@ 2006-06-08 16:11 ` John Rigby
2006-06-08 19:50 ` Trueskew
0 siblings, 1 reply; 6+ messages in thread
From: John Rigby @ 2006-06-08 16:11 UTC (permalink / raw)
To: Trueskew; +Cc: linuxppc-embedded
[-- Attachment #1: Type: text/plain, Size: 13105 bytes --]
Here's an include file that goes with file in the last email.
On 6/8/06, John Rigby <jcrigby@gmail.com> wrote:
> There seems to be a conflict between two sections of the 5200 User manual.
> In section 7.3 where port_config is documented the PSC3 configuration
> bits (20:23)
> defined as:
>
> 0000 = All PSC3 pins are GPIOs
> 0001 = USB2 on PSC3, no GPIOs available, see Note 3
> 001X = Reserved
> 0100 = UART functionality without CD
> 0101 = UARTe functionality with CD
> 0110 = CODEC3 functionality
> 0111 = CODEC3 functionality (with MCLK)
> 100X = SPI
> 101X = Reserved
> 1100 = SPI with UART3
> 1101 = SPI with UART3e
> 111X = SPI with CODEC3
>
> but in the psc chapter in table 15-85 it says to set port config to
> 0x00000600 but
> the description says "Select the Pin-Muxing for PSC3 Codec mode"
>
> It appears that table 15-85 is wrong.
>
> I have attached some spi code that is embedded in a touchscreen
> driver. It might be helpful.
>
>
>
>
>
> On 6/7/06, Trueskew <trueskew@gmail.com> wrote:
> >
> >
> > We have an AIC26 codec connected to our Lite5200B platform via J21. I've
> > used MPC5200BUG to configure PSC3 as an SPI master, along with some samples
> > I've found online (including here) and some I received from Freescale.
> > Although the transfers seem to be working as expected (please see the output
> > file at the end of this message), I get only 0xffff back. This occurs
> > whether or not the device is attached to J21. A scope shows that PSC3_8
> > (SPI_SS) and PSC3_9 (SPI_CLK) are low at all times, and I'm concerned I'm
> > still doing something wrong with respect to enabling SPI over PSC3.
> >
> > I'm including my driver initialization code, my write code, and output
> > showing the write behavior. If someone could comment on it, I would greatly
> > appreciate it... or if someone flat out has code to do this, I'd be happy to
> > take it from you. I've seen a few variations, but whether I use them
> > directly or modify them as I need to, I can't seem to get past this. Of
> > course, any other suggestions are welcome.
> >
> > Thanks.
> > Sal
> >
> > ---------------------------------------------------------------------------
> > Initialization Code
> > ---------------------------------------------------------------------------
> > #define GPIO_PSC3_PORT_CONFIG_MASK 0x00000f00
> > #ifdef SPI_USE_MCLK
> > #define GPIO_PSC3_PORT_CONFIG 0x00000700 /* PSC3 mode with mclk */
> > #else /* SPI_USE_MCLK */
> > #define GPIO_PSC3_PORT_CONFIG 0x00000600 /* PSC3 mode */
> > #endif /* SPI_USE_MCLK */
> >
> > #define CDM_PSC3_MCLK_ENABLE 0x00000080
> > #define CDM_PSC3_MCLK_CONFIG 0x8020 /* Divide Fvco ftom 528 to
> > 16Mhz */
> >
> > #define PSC3_SICR_REG_VALUE 0x0280f000 /* 16-bit select Codec SPI
> > master
> > mode, msb first,
> > UseEOF=1.
> > GenClk=1, SIM,
> > CPOL and
> > CPHA are
> > function
> > input */
> > ...
> > /* Select the Pin-Muxing for PSC3 Codec mode */
> > gpio = (struct mpc52xx_gpio *) ioremap(MPC52xx_GPIO,
> > sizeof(struct mpc52xx_gpio));
> > if(gpio)
> > {
> > port_config = gpio->port_config;
> > port_config &= ~GPIO_PSC3_PORT_CONFIG_MASK;
> > port_config |= GPIO_PSC3_PORT_CONFIG;
> > gpio->port_config = port_config;
> > iounmap(gpio);
> > }
> > else
> > {
> > return(-1);
> > }
> >
> > #ifdef SPI_USE_MCLK
> > /* PSC clock enable */
> > g_pCDM->clk_enables |= CDM_PSC3_MCLK_ENABLE;
> > g_pCDM->mclken_div_psc3 = CDM_PSC3_MCLK_CONFIG;
> > #endif /* SPI_USE_MCLK */
> >
> > /* Disable rx and tx */
> > g_pPSC->command = MPC52xx_PSC_RST_RX;
> > g_pPSC->command = MPC52xx_PSC_RST_TX;
> > g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> > g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> > g_pPSC->command = MPC52xx_PSC_RX_DISABLE | MPC52xx_PSC_TX_DISABLE;
> >
> > g_pPSC->mode = 0;
> > g_pPSC->sicr = PSC3_SICR_REG_VALUE;
> >
> > #ifdef SPI_USE_MCLK
> > g_pPSC->ccr=0x0703; /* set SCK and DSCKL delay */
> > #else /* SPI_USE_MCLK */
> > g_pPSC->ccr=0x0003; /* set SCK and DSCKL delay must be > 2 */
> > #endif /* SPI_USE_MCLK */
> >
> > g_pPSC->ctur=0x00; /* Set DTL delay 2us */
> > g_pPSC->ctlr=0x84;
> >
> > g_pPSC->rfalarm=100; /* Alarm values taken from SPI example sample
> > */
> > g_pPSC->tfalarm=1;
> >
> > g_pPSC->rfcntl &= 0xf8; /* 0 byte granularity */
> > g_pPSC->tfcntl = 1;
> >
> > /* Enable rx & tx */
> > g_pPSC->command = MPC52xx_PSC_RST_RX;
> > g_pPSC->command = MPC52xx_PSC_RST_TX;
> > g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> > g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> > g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
> >
> > ---------------------------------------------------------------------------
> > Write code
> > ---------------------------------------------------------------------------
> > static int mpc52xx_spi_transfer(u16 *p_usBuffer, u16 p_usCount)
> > {
> > u16 usIndex, usTemp;
> >
> >
> > printk("------------------------------------------------------\n");
> > printk("Entry: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > g_pPSC->command = MPC52xx_PSC_RST_RX;
> > g_pPSC->command = MPC52xx_PSC_RST_TX;
> > g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> > g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> > g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
> > printk("TX-RX Enable: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> >
> > /* Clean out the read FIFO */
> > usIndex = 0;
> > while(g_pPSC->mpc52xx_psc_status & MPC52xx_PSC_SR_RXRDY)
> > {
> > usTemp = g_pPSC->mpc52xx_psc_buffer_16;
> > printk("Flushing Rx FIFO: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > usIndex++;
> > if(usIndex == 10) return(-1);
> > }
> >
> > /* Send out the buffer */
> > g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_DISABLE;
> > for(usIndex=0; usIndex<p_usCount; usIndex++)
> > {
> > printk("Sending %04x: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> > p_usBuffer[usIndex],
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > g_pPSC->mpc52xx_psc_buffer_16 = p_usBuffer[usIndex];
> > printk("Sent: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > }
> > g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
> > usTemp = 0;
> > while(g_pPSC->tfnum)
> > {
> > printk("TFNUM Wait: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > usTemp++;
> > if(usTemp == 10) return(-1);
> > };
> > printk("TxRDY: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > for(usIndex=0; usIndex<p_usCount; usIndex++)
> > {
> > usTemp = 0;
> > while(!(g_pPSC->mpc52xx_psc_status &
> > MPC52xx_PSC_SR_RXRDY))
> > {
> > printk("RxRDY Wait: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > usTemp++;
> > if(usTemp == 10) return(-1);
> > };
> > printk("RxRDY: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > p_usBuffer[usIndex] = g_pPSC->mpc52xx_psc_buffer_16;
> > printk(" Received %04x\n", p_usBuffer[usIndex]);
> > }
> >
> > printk("EXIT: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> > (int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC->mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > return(usIndex);
> > }
> >
> >
> > ---------------------------------------------------------------------------
> > Output
> > ---------------------------------------------------------------------------
> > The lines below are a capture of register settings from my driver,
> > along with output lines when trying to write 16 bit words to our
> > device. This output is consistent whether the device is connected
> > or not (via J21). Basic operation, delimited by "------...---":
> >
> > - Disable TX, Enable RX (despite the "TX-RX Enable" heading)
> > - Send word 1
> > - Send word 2
> > - Enable TX, Enable RX
> > - Wait for tfnum == 0
> > - Receive data
> >
> > port_config=91051624 sicr=0280f000 clk_enables=00ffffff div_psc3=800f
> > ------------------------------------------------------
> > Entry: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> > tfnum 0 rfnum 0
> > TX-RX Enable: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> > tfnum 0 rfnum 0
> > Sending 0880: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > Sending bb00: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 4 rfnum 0
> > TFNUM Wait: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > TxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 4
> > RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 4
> > Received ffff
> > RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 2
> > Received ffff
> > EXIT: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > ------------------------------------------------------
> > Entry: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > TX-RX Enable: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> > tfnum 0 rfnum 0
> > Sending 8820: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > Sending 0000: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 4 rfnum 0
> > TFNUM Wait: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > TxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 4
> > RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 4
> > Received ffff
> > RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 2
> > Received ffff
> > EXIT: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > _______________________________________________
> > Linuxppc-embedded mailing list
> > Linuxppc-embedded@ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> >
> >
>
>
>
[-- Attachment #2: mpc5200_ts_spi.h --]
[-- Type: text/plain, Size: 3296 bytes --]
/*
* Media5200 touchscreen driver
*
* Copyright (c) 2006 Freescale
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
/*
File : "mpc5200_ts_spi.h"
Summary: spi header file
*/
#ifndef __MPC5200_TS_SPI_H
#define __MPC5200_TS_SPI_H
/* headers */
#include "mpc5200_ts_common.h"
#include "mpc5200_ts_spi_dfn.h"
typedef struct SPI_Config_Type
{
u8 SPI_Master; /* 1 = SPI device is Master; */
/* 0 = SPI device is Slave */
u8 ClockPolarity; /* 1 = Active-low clocks selected;*/
/* 0 = Active-high clocks selected */
u8 ClockPhase; /* Clock Phase */
u8 WiredOR; /* 1 = Wired-OR mode */
u8 SPI_Enable; /* 1 = SPI system enable */
u8 SSoutput; /* 1 = SS as general-purpose output*/
u32 BaudRate; /* Baud Rate ,the unit is KHz */
} SPI_Config_T;
typedef struct ClockDivisor_Type
{
u8 reg_value; /* The corresponding register value */
u16 clockdivisor; /* Clock Divisor */
} ClockDivisor_T;
/* The following are default values of SPI configuration : code review */
#define SPI_MASTER_DEFAULT 1
#define SPI_CPOL_DEFAULT 1
#define SPI_CPHA_DEFAULT 1
#define SPI_WOR_DEFAULT 1
#define SPI_SPE_DEFAULT 1
#define SPI_SSOE_DEFAULT 1 /*WeiWei add it for SSOE bit */
//#define SPI_BAUD_DEFAULT 206250 // with 66MHZ clock, should yield 320 divisor .. this may solve errata sheet where SPIF set before data ready below 200KHZ 50000
#define SPI_BAUD_DEFAULT 128900 // with 132MHz bus, 1024
//#define SPI_BAUD_DEFAULT 50000
#define RCVBUF_SIZE_DEFAULT 512
#define RCVBUF_MIN_SIZE 4
#define RCVBUF_MAX_SIZE 4096
#define MSG_MAX_SIZE 2048
#define BUFSIZE 512
/* setting for module clock is now 132MHZ for Media5200 */
#define SPI_MODULE_CLOCK 132000000
#define SPI_DIVISOR_NUM 36
#define NANOSECS_PER_WRITE 1000000
#define NANOSECS_FOR_WCOL 1000000
#define LOOPS 10
/* Clock Divisor Selections Array. All clock divisor selections the spi driver
* can support are arranged between 640 to 2048 in ascending order. The supported
* baudrate range will rely on the SPI module clock( system clock).
* Given 66MHz system clock, the baudrate ranged between 33000Hz to 100000Hz.
*/
/* For memory leak : up the baud rate to 100KHz */
ClockDivisor_T Clock_Divisor[SPI_DIVISOR_NUM] =
{ { 0x45, 320},{ 0x46, 640 }, { 0x56, 768 }, { 0x66, 896 }, { 0x76, 1024 }, { 0x47, 1280 }, { 0x57, 1536 },{ 0x67, 1792}, { 0x77, 2048 } };
SPI_Regs_T *SPI_Regs; /* spi register struct */
/* public function prototyping */
int spi_init (void);
int write_spi(u8 *buffer, u32 nbytes);
int read_spi(u8 *buffer, u32 nbytes);
/* private functions prototyping */
static int SPI_SetConfig(SPI_Config_T * Config_Ptr );
static int SPI_SetBaudrate( u32 BaudRate);
#endif
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: MPC5200B SPI PSC3 Problem
2006-06-08 16:11 ` John Rigby
@ 2006-06-08 19:50 ` Trueskew
0 siblings, 0 replies; 6+ messages in thread
From: Trueskew @ 2006-06-08 19:50 UTC (permalink / raw)
To: 'John Rigby'; +Cc: linuxppc-embedded
Thanks John. I actually decided not to sleep last night and figured all of
that out, including the documentation conflict, and now I'm working. I
wasn't even sure my post work, I didn't receive it, but maybe the sender is
left out. I should've slept and waited for your reply.
I'm still a little confused though. I re-checked code from Freescale and
references and patches listed or mentioned here, and they all use either
0x06 or 0x07 for the GPIO port config, depending on whether they want MCLK
or not. The included SPI transfer routines use the PSC3 FIFO mechanism to
send and receive data. The biggest light bulb shot for how I figured out
what was going on was because I decided to hang a scope off the codec lines
of the PSC3, and that's where I found the data I was sending out. The
MPC5200B vs. MPC5200 doc from Freescale doesn't mention this area as
changed, so how do so many 5200 SPI solutions go this route? I wondered if
they worked on reference platforms that were using the codec lines to drive
SPI, which looks like it's doable, but some solutions advertise themselves
as MPC5200 SPI drivers. Another possibility is that they weren't tested.
And yet another, the one I'm concerned with, is that I'm still
misunderstanding something... hence the paragraph.
But in any case, thanks again, I appreciate the help.
-----Original Message-----
From: John Rigby [mailto:jcrigby@gmail.com]
Sent: Thursday, June 08, 2006 9:11 AM
To: Trueskew
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: MPC5200B SPI PSC3 Problem
Here's an include file that goes with file in the last email.
On 6/8/06, John Rigby <jcrigby@gmail.com> wrote:
> There seems to be a conflict between two sections of the 5200 User manual.
> In section 7.3 where port_config is documented the PSC3 configuration
> bits (20:23) defined as:
>
> 0000 = All PSC3 pins are GPIOs
> 0001 = USB2 on PSC3, no GPIOs available, see Note 3 001X = Reserved
> 0100 = UART functionality without CD
> 0101 = UARTe functionality with CD
> 0110 = CODEC3 functionality
> 0111 = CODEC3 functionality (with MCLK) 100X = SPI 101X = Reserved
> 1100 = SPI with UART3
> 1101 = SPI with UART3e
> 111X = SPI with CODEC3
>
> but in the psc chapter in table 15-85 it says to set port config to
> 0x00000600 but the description says "Select the Pin-Muxing for PSC3
> Codec mode"
>
> It appears that table 15-85 is wrong.
>
> I have attached some spi code that is embedded in a touchscreen
> driver. It might be helpful.
>
>
>
>
>
> On 6/7/06, Trueskew <trueskew@gmail.com> wrote:
> >
> >
> > We have an AIC26 codec connected to our Lite5200B platform via J21.
> > I've used MPC5200BUG to configure PSC3 as an SPI master, along with
> > some samples I've found online (including here) and some I received from
Freescale.
> > Although the transfers seem to be working as expected (please see
> > the output file at the end of this message), I get only 0xffff back.
> > This occurs whether or not the device is attached to J21. A scope
> > shows that PSC3_8
> > (SPI_SS) and PSC3_9 (SPI_CLK) are low at all times, and I'm
> > concerned I'm still doing something wrong with respect to enabling SPI
over PSC3.
> >
> > I'm including my driver initialization code, my write code, and
> > output showing the write behavior. If someone could comment on it,
> > I would greatly appreciate it... or if someone flat out has code to
> > do this, I'd be happy to take it from you. I've seen a few
> > variations, but whether I use them directly or modify them as I need
> > to, I can't seem to get past this. Of course, any other suggestions are
welcome.
> >
> > Thanks.
> > Sal
> >
> > --------------------------------------------------------------------
> > -------
> > Initialization Code
> > --------------------------------------------------------------------
> > ------- #define GPIO_PSC3_PORT_CONFIG_MASK 0x00000f00 #ifdef
> > SPI_USE_MCLK
> > #define GPIO_PSC3_PORT_CONFIG 0x00000700 /* PSC3 mode with mclk
*/
> > #else /* SPI_USE_MCLK */
> > #define GPIO_PSC3_PORT_CONFIG 0x00000600 /* PSC3 mode */
> > #endif /* SPI_USE_MCLK */
> >
> > #define CDM_PSC3_MCLK_ENABLE 0x00000080
> > #define CDM_PSC3_MCLK_CONFIG 0x8020 /* Divide Fvco ftom 528
to
> > 16Mhz */
> >
> > #define PSC3_SICR_REG_VALUE 0x0280f000 /* 16-bit select Codec
SPI
> > master mode, msb
> > first,
> > UseEOF=1.
> > GenClk=1, SIM,
> > CPOL and CPHA are
> > function input */
> > ...
> > /* Select the Pin-Muxing for PSC3 Codec mode */
> > gpio = (struct mpc52xx_gpio *) ioremap(MPC52xx_GPIO,
> > sizeof(struct mpc52xx_gpio));
> > if(gpio)
> > {
> > port_config = gpio->port_config;
> > port_config &= ~GPIO_PSC3_PORT_CONFIG_MASK;
> > port_config |= GPIO_PSC3_PORT_CONFIG;
> > gpio->port_config = port_config;
> > iounmap(gpio);
> > }
> > else
> > {
> > return(-1);
> > }
> >
> > #ifdef SPI_USE_MCLK
> > /* PSC clock enable */
> > g_pCDM->clk_enables |= CDM_PSC3_MCLK_ENABLE;
> > g_pCDM->mclken_div_psc3 = CDM_PSC3_MCLK_CONFIG; #endif /*
> > SPI_USE_MCLK */
> >
> > /* Disable rx and tx */
> > g_pPSC->command = MPC52xx_PSC_RST_RX;
> > g_pPSC->command = MPC52xx_PSC_RST_TX;
> > g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> > g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> > g_pPSC->command = MPC52xx_PSC_RX_DISABLE |
> > MPC52xx_PSC_TX_DISABLE;
> >
> > g_pPSC->mode = 0;
> > g_pPSC->sicr = PSC3_SICR_REG_VALUE;
> >
> > #ifdef SPI_USE_MCLK
> > g_pPSC->ccr=0x0703; /* set SCK and DSCKL delay */
> > #else /* SPI_USE_MCLK */
> > g_pPSC->ccr=0x0003; /* set SCK and DSCKL delay must be > 2 */
> > #endif /* SPI_USE_MCLK */
> >
> > g_pPSC->ctur=0x00; /* Set DTL delay 2us */
> > g_pPSC->ctlr=0x84;
> >
> > g_pPSC->rfalarm=100; /* Alarm values taken from SPI example
sample
> > */
> > g_pPSC->tfalarm=1;
> >
> > g_pPSC->rfcntl &= 0xf8; /* 0 byte granularity */
> > g_pPSC->tfcntl = 1;
> >
> > /* Enable rx & tx */
> > g_pPSC->command = MPC52xx_PSC_RST_RX;
> > g_pPSC->command = MPC52xx_PSC_RST_TX;
> > g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> > g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> > g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
> >
> > --------------------------------------------------------------------
> > -------
> > Write code
> > --------------------------------------------------------------------
> > ------- static int mpc52xx_spi_transfer(u16 *p_usBuffer, u16
> > p_usCount) {
> > u16 usIndex, usTemp;
> >
> >
> > printk("------------------------------------------------------\n");
> > printk("Entry: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > g_pPSC->command = MPC52xx_PSC_RST_RX;
> > g_pPSC->command = MPC52xx_PSC_RST_TX;
> > g_pPSC->command = MPC52xx_PSC_SEL_MODE_REG_1;
> > g_pPSC->command = MPC52xx_PSC_RST_ERR_STAT;
> > g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
> > printk("TX-RX Enable: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> >
> > /* Clean out the read FIFO */
> > usIndex = 0;
> > while(g_pPSC->mpc52xx_psc_status & MPC52xx_PSC_SR_RXRDY)
> > {
> > usTemp = g_pPSC->mpc52xx_psc_buffer_16;
> > printk("Flushing Rx FIFO: psc=%x status=%04x tfstat=%04x
rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > usIndex++;
> > if(usIndex == 10) return(-1);
> > }
> >
> > /* Send out the buffer */
> > g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_DISABLE;
> > for(usIndex=0; usIndex<p_usCount; usIndex++)
> > {
> > printk("Sending %04x: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> > p_usBuffer[usIndex],
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > g_pPSC->mpc52xx_psc_buffer_16 = p_usBuffer[usIndex];
> > printk("Sent: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > }
> > g_pPSC->command = MPC52xx_PSC_RX_ENABLE | MPC52xx_PSC_TX_ENABLE;
> > usTemp = 0;
> > while(g_pPSC->tfnum)
> > {
> > printk("TFNUM Wait: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > usTemp++;
> > if(usTemp == 10) return(-1);
> > };
> > printk("TxRDY: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > for(usIndex=0; usIndex<p_usCount; usIndex++)
> > {
> > usTemp = 0;
> > while(!(g_pPSC->mpc52xx_psc_status &
> > MPC52xx_PSC_SR_RXRDY))
> > {
> > printk("RxRDY Wait: psc=%x status=%04x tfstat=%04x
rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > udelay(100000);
> > usTemp++;
> > if(usTemp == 10) return(-1);
> > };
> > printk("RxRDY: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > p_usBuffer[usIndex] = g_pPSC->mpc52xx_psc_buffer_16;
> > printk(" Received %04x\n", p_usBuffer[usIndex]);
> > }
> >
> > printk("EXIT: psc=%x status=%04x tfstat=%04x rfstat=%04x
> > mode=%02x\n tfnum %3d rfnum %3d\n",
> >
> >
(int)g_pPSC,g_pPSC->mpc52xx_psc_status,g_pPSC->tfstat,g_pPSC->tfstat,g_pPSC-
>mode,
> > g_pPSC->tfnum, g_pPSC->rfnum);
> > return(usIndex);
> > }
> >
> >
> > --------------------------------------------------------------------
> > -------
> > Output
> > --------------------------------------------------------------------
> > ------- The lines below are a capture of register settings from my
> > driver, along with output lines when trying to write 16 bit words to
> > our device. This output is consistent whether the device is
> > connected or not (via J21). Basic operation, delimited by
> > "------...---":
> >
> > - Disable TX, Enable RX (despite the "TX-RX Enable" heading)
> > - Send word 1
> > - Send word 2
> > - Enable TX, Enable RX
> > - Wait for tfnum == 0
> > - Receive data
> >
> > port_config=91051624 sicr=0280f000 clk_enables=00ffffff
> > div_psc3=800f
> > ------------------------------------------------------
> > Entry: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> > tfnum 0 rfnum 0
> > TX-RX Enable: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> > tfnum 0 rfnum 0
> > Sending 0880: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > Sending bb00: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 4 rfnum 0
> > TFNUM Wait: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > TxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 4
> > RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 4
> > Received ffff
> > RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 2
> > Received ffff
> > EXIT: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > ------------------------------------------------------
> > Entry: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > TX-RX Enable: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=33
> > tfnum 0 rfnum 0
> > Sending 8820: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > Sending 0000: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > Sent: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 4 rfnum 0
> > TFNUM Wait: psc=f0002400 status=0000 tfstat=0002 rfstat=0002 mode=07
> > tfnum 2 rfnum 0
> > TxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 4
> > RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 4
> > Received ffff
> > RxRDY: psc=f0002400 status=0500 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 2
> > Received ffff
> > EXIT: psc=f0002400 status=0400 tfstat=0003 rfstat=0003 mode=07
> > tfnum 0 rfnum 0
> > _______________________________________________
> > Linuxppc-embedded mailing list
> > Linuxppc-embedded@ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> >
> >
>
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: MPC5200B SPI PSC3 Problem
@ 2006-06-13 21:11 Trueskew
0 siblings, 0 replies; 6+ messages in thread
From: Trueskew @ 2006-06-13 21:11 UTC (permalink / raw)
To: linuxppc-embedded
Ok, I'm slightly less confused, and since I may have caused confusion I'll
clarify a little here. Sorry if some of you knew this already.
The MPC5200B has an SPI interface described in Chapter 17 of the MPC5200B
Users Guide. It uses either lines PSC3_6 - PSC3_9, or some of the Timer
pins. The MPC5200B also has an SPI available through the PSCs that use the
codec lines (PSC3_0 - PSC3_3). Depending on what rev of the user's guide
you have, there's a table in Chapter 15 that suggests you can set up PSC3
for Codec and SPI. Unfortunately, the SPI they're talking about is the
8-bit SPI, not the PSC3 SPI.
That was the basic source for my confusion. Hints here and in other places
and some parts of the manual suggested, but it was the scope that really
drove that home for me. I won't elaborate anymore here since for all I know
I'm the only person who just figured that out, but if anyone is struggling
like I just did and has any questions, I'm not a guru but I'll try to help.
Good luck.
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: MPC5200B SPI PSC3 Problem
@ 2006-06-17 4:22 Trueskew
0 siblings, 0 replies; 6+ messages in thread
From: Trueskew @ 2006-06-17 4:22 UTC (permalink / raw)
To: linuxppc-embedded
Ok, I'm slightly less confused, and since I may have caused confusion I'll
clarify a little here. Sorry if some of you knew this already.
The MPC5200B has an SPI interface described in Chapter 17 of the MPC5200B
Users Guide. It uses either lines PSC3_6 - PSC3_9, or some of the Timer
pins. The MPC5200B also has an SPI available through the PSCs that use the
codec lines (PSC3_0 - PSC3_3). Depending on what rev of the user's guide
you have, there's a table in Chapter 15 that suggests you can set up PSC3
for Codec and SPI. Unfortunately, the SPI they're talking about is the
8-bit SPI, not the PSC3 SPI.
That was the basic source for my confusion. Hints here and in other places
and some parts of the manual suggested, but it was the scope that really
drove that home for me. I won't elaborate anymore here since for all I know
I'm the only person who just figured that out, but if anyone is struggling
like I just did and has any questions, I'm not a guru but I'll try to help.
Good luck.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2006-06-17 4:29 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2006-06-13 21:11 MPC5200B SPI PSC3 Problem Trueskew
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2006-06-17 4:22 Trueskew
2006-06-07 22:21 Trueskew
2006-06-08 16:04 ` John Rigby
2006-06-08 16:11 ` John Rigby
2006-06-08 19:50 ` Trueskew
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