* (unknown)
@ 2019-12-12 15:50 周琰杰 (Zhou Yanjie)
2019-12-12 15:50 ` [PATCH 0/2] Add I2C support for the Ingenic X1000 SoC 周琰杰 (Zhou Yanjie)
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: 周琰杰 (Zhou Yanjie) @ 2019-12-12 15:50 UTC (permalink / raw)
To: linux-mips
Cc: linux-kernel, linux-i2c, devicetree, robh+dt, mark.rutland, paul,
paul.burton, paulburton, sernia.zhou, zhenwenjin
Add support for probing i2c driver on the X1000 Soc from Ingenic.
call the corresponding fifo parameter according to the device
model obtained from the devicetree.
^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH 0/2] Add I2C support for the Ingenic X1000 SoC. 2019-12-12 15:50 (unknown) 周琰杰 (Zhou Yanjie) @ 2019-12-12 15:50 ` 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 1/2] dt-bindings: I2C: Add X1000 bindings 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 2/2] I2C: JZ4780: Add support for the X1000 周琰杰 (Zhou Yanjie) 2 siblings, 0 replies; 6+ messages in thread From: 周琰杰 (Zhou Yanjie) @ 2019-12-12 15:50 UTC (permalink / raw) To: linux-mips Cc: linux-kernel, linux-i2c, devicetree, robh+dt, mark.rutland, paul, paul.burton, paulburton, sernia.zhou, zhenwenjin *** BLURB HERE *** 周琰杰 (Zhou Yanjie) (2): dt-bindings: I2C: Add X1000 bindings. I2C: JZ4780: Add support for the X1000. .../devicetree/bindings/i2c/i2c-jz4780.txt | 4 +- drivers/i2c/busses/i2c-jz4780.c | 159 +++++++++++++++------ 2 files changed, 120 insertions(+), 43 deletions(-) -- 2.7.4 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 1/2] dt-bindings: I2C: Add X1000 bindings. 2019-12-12 15:50 (unknown) 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 0/2] Add I2C support for the Ingenic X1000 SoC 周琰杰 (Zhou Yanjie) @ 2019-12-12 15:50 ` 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 2/2] I2C: JZ4780: Add support for the X1000 周琰杰 (Zhou Yanjie) 2 siblings, 0 replies; 6+ messages in thread From: 周琰杰 (Zhou Yanjie) @ 2019-12-12 15:50 UTC (permalink / raw) To: linux-mips Cc: linux-kernel, linux-i2c, devicetree, robh+dt, mark.rutland, paul, paul.burton, paulburton, sernia.zhou, zhenwenjin Add the I2C bindings for the X1000 Soc from Ingenic. Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> --- Documentation/devicetree/bindings/i2c/i2c-jz4780.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/i2c/i2c-jz4780.txt b/Documentation/devicetree/bindings/i2c/i2c-jz4780.txt index 3738cfb..d229eff 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-jz4780.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-jz4780.txt @@ -1,7 +1,9 @@ * Ingenic JZ4780 I2C Bus controller Required properties: -- compatible: should be "ingenic,jz4780-i2c" +- compatible: should be one of the following: + - "ingenic,jz4780-i2c" for the JZ4780 + - "ingenic,x1000-i2c" for the X1000 - reg: Should contain the address & size of the I2C controller registers. - interrupts: Should specify the interrupt provided by parent. - clocks: Should contain a single clock specifier for the JZ4780 I2C clock. -- 2.7.4 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 2/2] I2C: JZ4780: Add support for the X1000. 2019-12-12 15:50 (unknown) 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 0/2] Add I2C support for the Ingenic X1000 SoC 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 1/2] dt-bindings: I2C: Add X1000 bindings 周琰杰 (Zhou Yanjie) @ 2019-12-12 15:50 ` 周琰杰 (Zhou Yanjie) 2019-12-13 21:21 ` Paul Cercueil 2 siblings, 1 reply; 6+ messages in thread From: 周琰杰 (Zhou Yanjie) @ 2019-12-12 15:50 UTC (permalink / raw) To: linux-mips Cc: linux-kernel, linux-i2c, devicetree, robh+dt, mark.rutland, paul, paul.burton, paulburton, sernia.zhou, zhenwenjin Add support for probing i2c driver on the X1000 Soc from Ingenic. call the corresponding fifo parameter according to the device model obtained from the devicetree. Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> --- drivers/i2c/busses/i2c-jz4780.c | 159 +++++++++++++++++++++++++++++----------- 1 file changed, 117 insertions(+), 42 deletions(-) diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c index 25dcd73..3b21896 100644 --- a/drivers/i2c/busses/i2c-jz4780.c +++ b/drivers/i2c/busses/i2c-jz4780.c @@ -4,6 +4,7 @@ * * Copyright (C) 2006 - 2009 Ingenic Semiconductor Inc. * Copyright (C) 2015 Imagination Technologies + * Copyright (C) 2019 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> */ #include <linux/bitops.h> @@ -17,6 +18,7 @@ #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/sched.h> #include <linux/slab.h> @@ -55,6 +57,7 @@ #define JZ4780_I2C_ACKGC 0x98 #define JZ4780_I2C_ENSTA 0x9C #define JZ4780_I2C_SDAHD 0xD0 +#define X1000_I2C_SDAHD 0x7C #define JZ4780_I2C_CTRL_STPHLD BIT(7) #define JZ4780_I2C_CTRL_SLVDIS BIT(6) @@ -73,6 +76,8 @@ #define JZ4780_I2C_STA_TFNF BIT(1) #define JZ4780_I2C_STA_ACT BIT(0) +#define X1000_I2C_DC_STOP BIT(9) + static const char * const jz4780_i2c_abrt_src[] = { "ABRT_7B_ADDR_NOACK", "ABRT_10ADDR1_NOACK", @@ -130,18 +135,32 @@ static const char * const jz4780_i2c_abrt_src[] = { #define JZ4780_I2CFLCNT_ADJUST(n) (((n) - 1) < 8 ? 8 : ((n) - 1)) #define JZ4780_I2C_FIFO_LEN 16 -#define TX_LEVEL 3 -#define RX_LEVEL (JZ4780_I2C_FIFO_LEN - TX_LEVEL - 1) + +#define X1000_I2C_FIFO_LEN 64 #define JZ4780_I2C_TIMEOUT 300 #define BUFSIZE 200 +enum ingenic_i2c_version { + ID_JZ4780, + ID_X1000, +}; + +/** ingenic_i2c_config: SOC specific config data. */ +struct ingenic_i2c_config { + int fifosize; + int tx_level; + int rx_level; +}; + struct jz4780_i2c { void __iomem *iomem; int irq; struct clk *clk; struct i2c_adapter adap; + enum ingenic_i2c_version version; + const struct ingenic_i2c_config *cdata; /* lock to protect rbuf and wbuf between xfer_rd/wr and irq handler */ spinlock_t lock; @@ -340,11 +359,18 @@ static int jz4780_i2c_set_speed(struct jz4780_i2c *i2c) if (hold_time >= 0) { /*i2c hold time enable */ - hold_time |= JZ4780_I2C_SDAHD_HDENB; - jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, hold_time); + if (i2c->version >= ID_X1000) + jz4780_i2c_writew(i2c, X1000_I2C_SDAHD, hold_time); + else { + hold_time |= JZ4780_I2C_SDAHD_HDENB; + jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, hold_time); + } } else { /* disable hold time */ - jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, 0); + if (i2c->version >= ID_X1000) + jz4780_i2c_writew(i2c, X1000_I2C_SDAHD, 0); + else + jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, 0); } return 0; @@ -359,9 +385,11 @@ static int jz4780_i2c_cleanup(struct jz4780_i2c *i2c) spin_lock_irqsave(&i2c->lock, flags); /* can send stop now if need */ - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); - tmp &= ~JZ4780_I2C_CTRL_STPHLD; - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + if (i2c->version < ID_X1000) { + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); + tmp &= ~JZ4780_I2C_CTRL_STPHLD; + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + } /* disable all interrupts first */ jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0); @@ -399,11 +427,18 @@ static int jz4780_i2c_prepare(struct jz4780_i2c *i2c) return jz4780_i2c_enable(i2c); } -static void jz4780_i2c_send_rcmd(struct jz4780_i2c *i2c, int cmd_count) +static void jz4780_i2c_send_rcmd(struct jz4780_i2c *i2c, + int cmd_count, int cmd_left) { int i; - for (i = 0; i < cmd_count; i++) + for (i = 0; i < cmd_count - 1; i++) + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, JZ4780_I2C_DC_READ); + + if ((cmd_left == 0) && (i2c->version >= ID_X1000)) + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, + JZ4780_I2C_DC_READ | X1000_I2C_DC_STOP); + else jz4780_i2c_writew(i2c, JZ4780_I2C_DC, JZ4780_I2C_DC_READ); } @@ -458,37 +493,40 @@ static irqreturn_t jz4780_i2c_irq(int irqno, void *dev_id) rd_left = i2c->rd_total_len - i2c->rd_data_xfered; - if (rd_left <= JZ4780_I2C_FIFO_LEN) + if (rd_left <= i2c->cdata->fifosize) jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, rd_left - 1); } if (intst & JZ4780_I2C_INTST_TXEMP) { if (i2c->is_write == 0) { int cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; - int max_send = (JZ4780_I2C_FIFO_LEN - 1) + int max_send = (i2c->cdata->fifosize - 1) - (i2c->rd_cmd_xfered - i2c->rd_data_xfered); int cmd_to_send = min(cmd_left, max_send); if (i2c->rd_cmd_xfered != 0) cmd_to_send = min(cmd_to_send, - JZ4780_I2C_FIFO_LEN - - TX_LEVEL - 1); + i2c->cdata->fifosize + - i2c->cdata->tx_level - 1); if (cmd_to_send) { - jz4780_i2c_send_rcmd(i2c, cmd_to_send); i2c->rd_cmd_xfered += cmd_to_send; + cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; + jz4780_i2c_send_rcmd(i2c, cmd_to_send, cmd_left); + } - cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; if (cmd_left == 0) { intmsk = jz4780_i2c_readw(i2c, JZ4780_I2C_INTM); intmsk &= ~JZ4780_I2C_INTM_MTXEMP; jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, intmsk); - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); - tmp &= ~JZ4780_I2C_CTRL_STPHLD; - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + if (i2c->version < ID_X1000) { + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); + tmp &= ~JZ4780_I2C_CTRL_STPHLD; + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + } } } else { unsigned short data; @@ -496,24 +534,22 @@ static irqreturn_t jz4780_i2c_irq(int irqno, void *dev_id) i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA); - while ((i2c_sta & JZ4780_I2C_STA_TFNF) && - (i2c->wt_len > 0)) { + while ((i2c_sta & JZ4780_I2C_STA_TFNF) && (i2c->wt_len > 0)) { i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA); data = *i2c->wbuf; data &= ~JZ4780_I2C_DC_READ; - jz4780_i2c_writew(i2c, JZ4780_I2C_DC, - data); + if ((!i2c->stop_hold) && (i2c->version >= ID_X1000)) + data |= X1000_I2C_DC_STOP; + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, data); i2c->wbuf++; i2c->wt_len--; } if (i2c->wt_len == 0) { - if (!i2c->stop_hold) { - tmp = jz4780_i2c_readw(i2c, - JZ4780_I2C_CTRL); + if ((!i2c->stop_hold) && (i2c->version < ID_X1000)) { + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); tmp &= ~JZ4780_I2C_CTRL_STPHLD; - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, - tmp); + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); } jz4780_i2c_trans_done(i2c); @@ -567,20 +603,22 @@ static inline int jz4780_i2c_xfer_read(struct jz4780_i2c *i2c, i2c->rd_data_xfered = 0; i2c->rd_cmd_xfered = 0; - if (len <= JZ4780_I2C_FIFO_LEN) + if (len <= i2c->cdata->fifosize) jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, len - 1); else - jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, RX_LEVEL); + jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, i2c->cdata->rx_level); - jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, TX_LEVEL); + jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, i2c->cdata->tx_level); jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, JZ4780_I2C_INTM_MRXFL | JZ4780_I2C_INTM_MTXEMP | JZ4780_I2C_INTM_MTXABT | JZ4780_I2C_INTM_MRXOF); - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); - tmp |= JZ4780_I2C_CTRL_STPHLD; - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + if (i2c->version < ID_X1000) { + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); + tmp |= JZ4780_I2C_CTRL_STPHLD; + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + } spin_unlock_irqrestore(&i2c->lock, flags); @@ -626,14 +664,16 @@ static inline int jz4780_i2c_xfer_write(struct jz4780_i2c *i2c, i2c->wbuf = buf; i2c->wt_len = len; - jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, TX_LEVEL); + jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, i2c->cdata->tx_level); jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, JZ4780_I2C_INTM_MTXEMP | JZ4780_I2C_INTM_MTXABT); - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); - tmp |= JZ4780_I2C_CTRL_STPHLD; - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + if (i2c->version < ID_X1000) { + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); + tmp |= JZ4780_I2C_CTRL_STPHLD; + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + } spin_unlock_irqrestore(&i2c->lock, flags); @@ -716,8 +756,21 @@ static const struct i2c_algorithm jz4780_i2c_algorithm = { .functionality = jz4780_i2c_functionality, }; +static const struct ingenic_i2c_config jz4780_i2c_config = { + .fifosize = JZ4780_I2C_FIFO_LEN, + .tx_level = JZ4780_I2C_FIFO_LEN / 2, + .rx_level = JZ4780_I2C_FIFO_LEN / 2 - 1, +}; + +static const struct ingenic_i2c_config x1000_i2c_config = { + .fifosize = X1000_I2C_FIFO_LEN, + .tx_level = X1000_I2C_FIFO_LEN / 2, + .rx_level = X1000_I2C_FIFO_LEN / 2 - 1, +}; + static const struct of_device_id jz4780_i2c_of_matches[] = { - { .compatible = "ingenic,jz4780-i2c", }, + { .compatible = "ingenic,jz4780-i2c", .data = (void *) ID_JZ4780 }, + { .compatible = "ingenic,x1000-i2c", .data = (void *) ID_X1000 }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, jz4780_i2c_of_matches); @@ -729,11 +782,24 @@ static int jz4780_i2c_probe(struct platform_device *pdev) unsigned short tmp; struct resource *r; struct jz4780_i2c *i2c; + const struct platform_device_id *id = platform_get_device_id(pdev); + const struct of_device_id *of_id = of_match_device( + jz4780_i2c_of_matches, &pdev->dev); i2c = devm_kzalloc(&pdev->dev, sizeof(struct jz4780_i2c), GFP_KERNEL); if (!i2c) return -ENOMEM; + if (of_id) + i2c->version = (enum ingenic_i2c_version)of_id->data; + else + i2c->version = (enum ingenic_i2c_version)id->driver_data; + + if (i2c->version >= ID_X1000) + i2c->cdata = &x1000_i2c_config; + else + i2c->cdata = &jz4780_i2c_config; + i2c->adap.owner = THIS_MODULE; i2c->adap.algo = &jz4780_i2c_algorithm; i2c->adap.algo_data = i2c; @@ -777,9 +843,11 @@ static int jz4780_i2c_probe(struct platform_device *pdev) dev_info(&pdev->dev, "Bus frequency is %d KHz\n", i2c->speed); - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); - tmp &= ~JZ4780_I2C_CTRL_STPHLD; - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + if (i2c->version < ID_X1000) { + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); + tmp &= ~JZ4780_I2C_CTRL_STPHLD; + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); + } jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0x0); @@ -809,6 +877,12 @@ static int jz4780_i2c_remove(struct platform_device *pdev) return 0; } +static const struct platform_device_id ingenic_i2c_ids[] = { + { "jz4780-i2c", ID_JZ4780 }, + { "x1000-i2c", ID_X1000 }, + {}, +}; + static struct platform_driver jz4780_i2c_driver = { .probe = jz4780_i2c_probe, .remove = jz4780_i2c_remove, @@ -816,6 +890,7 @@ static struct platform_driver jz4780_i2c_driver = { .name = "jz4780-i2c", .of_match_table = of_match_ptr(jz4780_i2c_of_matches), }, + .id_table = ingenic_i2c_ids, }; module_platform_driver(jz4780_i2c_driver); -- 2.7.4 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH 2/2] I2C: JZ4780: Add support for the X1000. 2019-12-12 15:50 ` [PATCH 2/2] I2C: JZ4780: Add support for the X1000 周琰杰 (Zhou Yanjie) @ 2019-12-13 21:21 ` Paul Cercueil 2019-12-14 12:32 ` zhouyanjie 0 siblings, 1 reply; 6+ messages in thread From: Paul Cercueil @ 2019-12-13 21:21 UTC (permalink / raw) To: 周琰杰 (Zhou Yanjie) Cc: linux-mips, linux-kernel, linux-i2c, devicetree, robh+dt, mark.rutland, paul.burton, paulburton, sernia.zhou, zhenwenjin Hi Zhou, Le jeu., déc. 12, 2019 at 23:50, 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> a écrit : > Add support for probing i2c driver on the X1000 Soc from Ingenic. > call the corresponding fifo parameter according to the device > model obtained from the devicetree. > > Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> > --- > drivers/i2c/busses/i2c-jz4780.c | 159 > +++++++++++++++++++++++++++++----------- > 1 file changed, 117 insertions(+), 42 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-jz4780.c > b/drivers/i2c/busses/i2c-jz4780.c > index 25dcd73..3b21896 100644 > --- a/drivers/i2c/busses/i2c-jz4780.c > +++ b/drivers/i2c/busses/i2c-jz4780.c > @@ -4,6 +4,7 @@ > * > * Copyright (C) 2006 - 2009 Ingenic Semiconductor Inc. > * Copyright (C) 2015 Imagination Technologies > + * Copyright (C) 2019 周琰杰 (Zhou Yanjie) > <zhouyanjie@wanyeetech.com> > */ > > #include <linux/bitops.h> > @@ -17,6 +18,7 @@ > #include <linux/io.h> > #include <linux/kernel.h> > #include <linux/module.h> > +#include <linux/of_device.h> > #include <linux/platform_device.h> > #include <linux/sched.h> > #include <linux/slab.h> > @@ -55,6 +57,7 @@ > #define JZ4780_I2C_ACKGC 0x98 > #define JZ4780_I2C_ENSTA 0x9C > #define JZ4780_I2C_SDAHD 0xD0 > +#define X1000_I2C_SDAHD 0x7C > > #define JZ4780_I2C_CTRL_STPHLD BIT(7) > #define JZ4780_I2C_CTRL_SLVDIS BIT(6) > @@ -73,6 +76,8 @@ > #define JZ4780_I2C_STA_TFNF BIT(1) > #define JZ4780_I2C_STA_ACT BIT(0) > > +#define X1000_I2C_DC_STOP BIT(9) > + > static const char * const jz4780_i2c_abrt_src[] = { > "ABRT_7B_ADDR_NOACK", > "ABRT_10ADDR1_NOACK", > @@ -130,18 +135,32 @@ static const char * const jz4780_i2c_abrt_src[] > = { > #define JZ4780_I2CFLCNT_ADJUST(n) (((n) - 1) < 8 ? 8 : ((n) - 1)) > > #define JZ4780_I2C_FIFO_LEN 16 > -#define TX_LEVEL 3 > -#define RX_LEVEL (JZ4780_I2C_FIFO_LEN - TX_LEVEL - 1) > + > +#define X1000_I2C_FIFO_LEN 64 > > #define JZ4780_I2C_TIMEOUT 300 > > #define BUFSIZE 200 > > +enum ingenic_i2c_version { > + ID_JZ4780, > + ID_X1000, > +}; > + > +/** ingenic_i2c_config: SOC specific config data. */ > +struct ingenic_i2c_config { > + int fifosize; > + int tx_level; > + int rx_level; > +}; > + > struct jz4780_i2c { > void __iomem *iomem; > int irq; > struct clk *clk; > struct i2c_adapter adap; > + enum ingenic_i2c_version version; > + const struct ingenic_i2c_config *cdata; > > /* lock to protect rbuf and wbuf between xfer_rd/wr and irq handler > */ > spinlock_t lock; > @@ -340,11 +359,18 @@ static int jz4780_i2c_set_speed(struct > jz4780_i2c *i2c) > > if (hold_time >= 0) { > /*i2c hold time enable */ > - hold_time |= JZ4780_I2C_SDAHD_HDENB; > - jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, hold_time); > + if (i2c->version >= ID_X1000) > + jz4780_i2c_writew(i2c, X1000_I2C_SDAHD, hold_time); > + else { > + hold_time |= JZ4780_I2C_SDAHD_HDENB; > + jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, hold_time); > + } > } else { > /* disable hold time */ > - jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, 0); > + if (i2c->version >= ID_X1000) > + jz4780_i2c_writew(i2c, X1000_I2C_SDAHD, 0); > + else > + jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, 0); > } > > return 0; > @@ -359,9 +385,11 @@ static int jz4780_i2c_cleanup(struct jz4780_i2c > *i2c) > spin_lock_irqsave(&i2c->lock, flags); > > /* can send stop now if need */ > - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > - tmp &= ~JZ4780_I2C_CTRL_STPHLD; > - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + if (i2c->version < ID_X1000) { > + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > + tmp &= ~JZ4780_I2C_CTRL_STPHLD; > + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + } > > /* disable all interrupts first */ > jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0); > @@ -399,11 +427,18 @@ static int jz4780_i2c_prepare(struct jz4780_i2c > *i2c) > return jz4780_i2c_enable(i2c); > } > > -static void jz4780_i2c_send_rcmd(struct jz4780_i2c *i2c, int > cmd_count) > +static void jz4780_i2c_send_rcmd(struct jz4780_i2c *i2c, > + int cmd_count, int cmd_left) > { > int i; > > - for (i = 0; i < cmd_count; i++) > + for (i = 0; i < cmd_count - 1; i++) > + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, JZ4780_I2C_DC_READ); > + > + if ((cmd_left == 0) && (i2c->version >= ID_X1000)) > + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, > + JZ4780_I2C_DC_READ | X1000_I2C_DC_STOP); > + else > jz4780_i2c_writew(i2c, JZ4780_I2C_DC, JZ4780_I2C_DC_READ); > } > > @@ -458,37 +493,40 @@ static irqreturn_t jz4780_i2c_irq(int irqno, > void *dev_id) > > rd_left = i2c->rd_total_len - i2c->rd_data_xfered; > > - if (rd_left <= JZ4780_I2C_FIFO_LEN) > + if (rd_left <= i2c->cdata->fifosize) > jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, rd_left - 1); > } > > if (intst & JZ4780_I2C_INTST_TXEMP) { > if (i2c->is_write == 0) { > int cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; > - int max_send = (JZ4780_I2C_FIFO_LEN - 1) > + int max_send = (i2c->cdata->fifosize - 1) > - (i2c->rd_cmd_xfered > - i2c->rd_data_xfered); > int cmd_to_send = min(cmd_left, max_send); > > if (i2c->rd_cmd_xfered != 0) > cmd_to_send = min(cmd_to_send, > - JZ4780_I2C_FIFO_LEN > - - TX_LEVEL - 1); > + i2c->cdata->fifosize > + - i2c->cdata->tx_level - 1); > > if (cmd_to_send) { > - jz4780_i2c_send_rcmd(i2c, cmd_to_send); > i2c->rd_cmd_xfered += cmd_to_send; > + cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; > + jz4780_i2c_send_rcmd(i2c, cmd_to_send, cmd_left); > + > } > > - cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; > if (cmd_left == 0) { > intmsk = jz4780_i2c_readw(i2c, JZ4780_I2C_INTM); > intmsk &= ~JZ4780_I2C_INTM_MTXEMP; > jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, intmsk); > > - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > - tmp &= ~JZ4780_I2C_CTRL_STPHLD; > - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + if (i2c->version < ID_X1000) { > + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > + tmp &= ~JZ4780_I2C_CTRL_STPHLD; > + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + } > } > } else { > unsigned short data; > @@ -496,24 +534,22 @@ static irqreturn_t jz4780_i2c_irq(int irqno, > void *dev_id) > > i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA); > > - while ((i2c_sta & JZ4780_I2C_STA_TFNF) && > - (i2c->wt_len > 0)) { > + while ((i2c_sta & JZ4780_I2C_STA_TFNF) && (i2c->wt_len > 0)) { > i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA); > data = *i2c->wbuf; > data &= ~JZ4780_I2C_DC_READ; > - jz4780_i2c_writew(i2c, JZ4780_I2C_DC, > - data); > + if ((!i2c->stop_hold) && (i2c->version >= ID_X1000)) > + data |= X1000_I2C_DC_STOP; > + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, data); > i2c->wbuf++; > i2c->wt_len--; > } > > if (i2c->wt_len == 0) { > - if (!i2c->stop_hold) { > - tmp = jz4780_i2c_readw(i2c, > - JZ4780_I2C_CTRL); > + if ((!i2c->stop_hold) && (i2c->version < ID_X1000)) { > + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > tmp &= ~JZ4780_I2C_CTRL_STPHLD; > - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, > - tmp); > + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > } > > jz4780_i2c_trans_done(i2c); > @@ -567,20 +603,22 @@ static inline int jz4780_i2c_xfer_read(struct > jz4780_i2c *i2c, > i2c->rd_data_xfered = 0; > i2c->rd_cmd_xfered = 0; > > - if (len <= JZ4780_I2C_FIFO_LEN) > + if (len <= i2c->cdata->fifosize) > jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, len - 1); > else > - jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, RX_LEVEL); > + jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, i2c->cdata->rx_level); > > - jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, TX_LEVEL); > + jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, i2c->cdata->tx_level); > > jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, > JZ4780_I2C_INTM_MRXFL | JZ4780_I2C_INTM_MTXEMP > | JZ4780_I2C_INTM_MTXABT | JZ4780_I2C_INTM_MRXOF); > > - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > - tmp |= JZ4780_I2C_CTRL_STPHLD; > - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + if (i2c->version < ID_X1000) { > + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > + tmp |= JZ4780_I2C_CTRL_STPHLD; > + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + } > > spin_unlock_irqrestore(&i2c->lock, flags); > > @@ -626,14 +664,16 @@ static inline int jz4780_i2c_xfer_write(struct > jz4780_i2c *i2c, > i2c->wbuf = buf; > i2c->wt_len = len; > > - jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, TX_LEVEL); > + jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, i2c->cdata->tx_level); > > jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, JZ4780_I2C_INTM_MTXEMP > | JZ4780_I2C_INTM_MTXABT); > > - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > - tmp |= JZ4780_I2C_CTRL_STPHLD; > - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + if (i2c->version < ID_X1000) { > + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > + tmp |= JZ4780_I2C_CTRL_STPHLD; > + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + } > > spin_unlock_irqrestore(&i2c->lock, flags); > > @@ -716,8 +756,21 @@ static const struct i2c_algorithm > jz4780_i2c_algorithm = { > .functionality = jz4780_i2c_functionality, > }; > > +static const struct ingenic_i2c_config jz4780_i2c_config = { > + .fifosize = JZ4780_I2C_FIFO_LEN, > + .tx_level = JZ4780_I2C_FIFO_LEN / 2, > + .rx_level = JZ4780_I2C_FIFO_LEN / 2 - 1, > +}; > + > +static const struct ingenic_i2c_config x1000_i2c_config = { > + .fifosize = X1000_I2C_FIFO_LEN, > + .tx_level = X1000_I2C_FIFO_LEN / 2, > + .rx_level = X1000_I2C_FIFO_LEN / 2 - 1, > +}; > + > static const struct of_device_id jz4780_i2c_of_matches[] = { > - { .compatible = "ingenic,jz4780-i2c", }, > + { .compatible = "ingenic,jz4780-i2c", .data = (void *) ID_JZ4780 }, > + { .compatible = "ingenic,x1000-i2c", .data = (void *) ID_X1000 }, I think in general you should pass pointers to your ingenic_i2c_config structures directly in .data here, and have a "version" field in your ingenic_i2c_config struct. > { /* sentinel */ } > }; > MODULE_DEVICE_TABLE(of, jz4780_i2c_of_matches); > @@ -729,11 +782,24 @@ static int jz4780_i2c_probe(struct > platform_device *pdev) > unsigned short tmp; > struct resource *r; > struct jz4780_i2c *i2c; > + const struct platform_device_id *id = platform_get_device_id(pdev); > + const struct of_device_id *of_id = of_match_device( > + jz4780_i2c_of_matches, &pdev->dev); > > i2c = devm_kzalloc(&pdev->dev, sizeof(struct jz4780_i2c), > GFP_KERNEL); > if (!i2c) > return -ENOMEM; > > + if (of_id) > + i2c->version = (enum ingenic_i2c_version)of_id->data; > + else > + i2c->version = (enum ingenic_i2c_version)id->driver_data; > + > + if (i2c->version >= ID_X1000) > + i2c->cdata = &x1000_i2c_config; > + else > + i2c->cdata = &jz4780_i2c_config; > + Then you can replace all these lines with: i2c->cdata = device_get_match_data(dev); And your checks on i2c->version become checks on i2c->cdata->version. > i2c->adap.owner = THIS_MODULE; > i2c->adap.algo = &jz4780_i2c_algorithm; > i2c->adap.algo_data = i2c; > @@ -777,9 +843,11 @@ static int jz4780_i2c_probe(struct > platform_device *pdev) > > dev_info(&pdev->dev, "Bus frequency is %d KHz\n", i2c->speed); > > - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > - tmp &= ~JZ4780_I2C_CTRL_STPHLD; > - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + if (i2c->version < ID_X1000) { > + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); > + tmp &= ~JZ4780_I2C_CTRL_STPHLD; > + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); > + } > > jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0x0); > > @@ -809,6 +877,12 @@ static int jz4780_i2c_remove(struct > platform_device *pdev) > return 0; > } > > +static const struct platform_device_id ingenic_i2c_ids[] = { > + { "jz4780-i2c", ID_JZ4780 }, > + { "x1000-i2c", ID_X1000 }, > + {}, I honestly think you can drop the platform ID table. It will never be used. Cheers, -Paul > +}; > + > static struct platform_driver jz4780_i2c_driver = { > .probe = jz4780_i2c_probe, > .remove = jz4780_i2c_remove, > @@ -816,6 +890,7 @@ static struct platform_driver jz4780_i2c_driver = > { > .name = "jz4780-i2c", > .of_match_table = of_match_ptr(jz4780_i2c_of_matches), > }, > + .id_table = ingenic_i2c_ids, > }; > > module_platform_driver(jz4780_i2c_driver); > -- > 2.7.4 > ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 2/2] I2C: JZ4780: Add support for the X1000. 2019-12-13 21:21 ` Paul Cercueil @ 2019-12-14 12:32 ` zhouyanjie 0 siblings, 0 replies; 6+ messages in thread From: zhouyanjie @ 2019-12-14 12:32 UTC (permalink / raw) To: Paul Cercueil Cc: linux-mips, linux-kernel, linux-i2c, devicetree, robh+dt, mark.rutland, paul.burton, paulburton, sernia.zhou, zhenwenjin Hi Paul, On 2019年12月14日 05:21, Paul Cercueil wrote: > Hi Zhou, > > > Le jeu., déc. 12, 2019 at 23:50, 周琰杰 (Zhou Yanjie) > <zhouyanjie@wanyeetech.com> a écrit : >> Add support for probing i2c driver on the X1000 Soc from Ingenic. >> call the corresponding fifo parameter according to the device >> model obtained from the devicetree. >> >> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> >> --- >> drivers/i2c/busses/i2c-jz4780.c | 159 >> +++++++++++++++++++++++++++++----------- >> 1 file changed, 117 insertions(+), 42 deletions(-) >> >> diff --git a/drivers/i2c/busses/i2c-jz4780.c >> b/drivers/i2c/busses/i2c-jz4780.c >> index 25dcd73..3b21896 100644 >> --- a/drivers/i2c/busses/i2c-jz4780.c >> +++ b/drivers/i2c/busses/i2c-jz4780.c >> @@ -4,6 +4,7 @@ >> * >> * Copyright (C) 2006 - 2009 Ingenic Semiconductor Inc. >> * Copyright (C) 2015 Imagination Technologies >> + * Copyright (C) 2019 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> >> */ >> >> #include <linux/bitops.h> >> @@ -17,6 +18,7 @@ >> #include <linux/io.h> >> #include <linux/kernel.h> >> #include <linux/module.h> >> +#include <linux/of_device.h> >> #include <linux/platform_device.h> >> #include <linux/sched.h> >> #include <linux/slab.h> >> @@ -55,6 +57,7 @@ >> #define JZ4780_I2C_ACKGC 0x98 >> #define JZ4780_I2C_ENSTA 0x9C >> #define JZ4780_I2C_SDAHD 0xD0 >> +#define X1000_I2C_SDAHD 0x7C >> >> #define JZ4780_I2C_CTRL_STPHLD BIT(7) >> #define JZ4780_I2C_CTRL_SLVDIS BIT(6) >> @@ -73,6 +76,8 @@ >> #define JZ4780_I2C_STA_TFNF BIT(1) >> #define JZ4780_I2C_STA_ACT BIT(0) >> >> +#define X1000_I2C_DC_STOP BIT(9) >> + >> static const char * const jz4780_i2c_abrt_src[] = { >> "ABRT_7B_ADDR_NOACK", >> "ABRT_10ADDR1_NOACK", >> @@ -130,18 +135,32 @@ static const char * const jz4780_i2c_abrt_src[] >> = { >> #define JZ4780_I2CFLCNT_ADJUST(n) (((n) - 1) < 8 ? 8 : ((n) - 1)) >> >> #define JZ4780_I2C_FIFO_LEN 16 >> -#define TX_LEVEL 3 >> -#define RX_LEVEL (JZ4780_I2C_FIFO_LEN - TX_LEVEL - 1) >> + >> +#define X1000_I2C_FIFO_LEN 64 >> >> #define JZ4780_I2C_TIMEOUT 300 >> >> #define BUFSIZE 200 >> >> +enum ingenic_i2c_version { >> + ID_JZ4780, >> + ID_X1000, >> +}; >> + >> +/** ingenic_i2c_config: SOC specific config data. */ >> +struct ingenic_i2c_config { >> + int fifosize; >> + int tx_level; >> + int rx_level; >> +}; >> + >> struct jz4780_i2c { >> void __iomem *iomem; >> int irq; >> struct clk *clk; >> struct i2c_adapter adap; >> + enum ingenic_i2c_version version; >> + const struct ingenic_i2c_config *cdata; >> >> /* lock to protect rbuf and wbuf between xfer_rd/wr and irq >> handler */ >> spinlock_t lock; >> @@ -340,11 +359,18 @@ static int jz4780_i2c_set_speed(struct >> jz4780_i2c *i2c) >> >> if (hold_time >= 0) { >> /*i2c hold time enable */ >> - hold_time |= JZ4780_I2C_SDAHD_HDENB; >> - jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, hold_time); >> + if (i2c->version >= ID_X1000) >> + jz4780_i2c_writew(i2c, X1000_I2C_SDAHD, hold_time); >> + else { >> + hold_time |= JZ4780_I2C_SDAHD_HDENB; >> + jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, hold_time); >> + } >> } else { >> /* disable hold time */ >> - jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, 0); >> + if (i2c->version >= ID_X1000) >> + jz4780_i2c_writew(i2c, X1000_I2C_SDAHD, 0); >> + else >> + jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, 0); >> } >> >> return 0; >> @@ -359,9 +385,11 @@ static int jz4780_i2c_cleanup(struct jz4780_i2c >> *i2c) >> spin_lock_irqsave(&i2c->lock, flags); >> >> /* can send stop now if need */ >> - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> - tmp &= ~JZ4780_I2C_CTRL_STPHLD; >> - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + if (i2c->version < ID_X1000) { >> + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> + tmp &= ~JZ4780_I2C_CTRL_STPHLD; >> + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + } >> >> /* disable all interrupts first */ >> jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0); >> @@ -399,11 +427,18 @@ static int jz4780_i2c_prepare(struct jz4780_i2c >> *i2c) >> return jz4780_i2c_enable(i2c); >> } >> >> -static void jz4780_i2c_send_rcmd(struct jz4780_i2c *i2c, int cmd_count) >> +static void jz4780_i2c_send_rcmd(struct jz4780_i2c *i2c, >> + int cmd_count, int cmd_left) >> { >> int i; >> >> - for (i = 0; i < cmd_count; i++) >> + for (i = 0; i < cmd_count - 1; i++) >> + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, JZ4780_I2C_DC_READ); >> + >> + if ((cmd_left == 0) && (i2c->version >= ID_X1000)) >> + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, >> + JZ4780_I2C_DC_READ | X1000_I2C_DC_STOP); >> + else >> jz4780_i2c_writew(i2c, JZ4780_I2C_DC, JZ4780_I2C_DC_READ); >> } >> >> @@ -458,37 +493,40 @@ static irqreturn_t jz4780_i2c_irq(int irqno, >> void *dev_id) >> >> rd_left = i2c->rd_total_len - i2c->rd_data_xfered; >> >> - if (rd_left <= JZ4780_I2C_FIFO_LEN) >> + if (rd_left <= i2c->cdata->fifosize) >> jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, rd_left - 1); >> } >> >> if (intst & JZ4780_I2C_INTST_TXEMP) { >> if (i2c->is_write == 0) { >> int cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; >> - int max_send = (JZ4780_I2C_FIFO_LEN - 1) >> + int max_send = (i2c->cdata->fifosize - 1) >> - (i2c->rd_cmd_xfered >> - i2c->rd_data_xfered); >> int cmd_to_send = min(cmd_left, max_send); >> >> if (i2c->rd_cmd_xfered != 0) >> cmd_to_send = min(cmd_to_send, >> - JZ4780_I2C_FIFO_LEN >> - - TX_LEVEL - 1); >> + i2c->cdata->fifosize >> + - i2c->cdata->tx_level - 1); >> >> if (cmd_to_send) { >> - jz4780_i2c_send_rcmd(i2c, cmd_to_send); >> i2c->rd_cmd_xfered += cmd_to_send; >> + cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; >> + jz4780_i2c_send_rcmd(i2c, cmd_to_send, cmd_left); >> + >> } >> >> - cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered; >> if (cmd_left == 0) { >> intmsk = jz4780_i2c_readw(i2c, JZ4780_I2C_INTM); >> intmsk &= ~JZ4780_I2C_INTM_MTXEMP; >> jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, intmsk); >> >> - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> - tmp &= ~JZ4780_I2C_CTRL_STPHLD; >> - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + if (i2c->version < ID_X1000) { >> + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> + tmp &= ~JZ4780_I2C_CTRL_STPHLD; >> + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + } >> } >> } else { >> unsigned short data; >> @@ -496,24 +534,22 @@ static irqreturn_t jz4780_i2c_irq(int irqno, >> void *dev_id) >> >> i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA); >> >> - while ((i2c_sta & JZ4780_I2C_STA_TFNF) && >> - (i2c->wt_len > 0)) { >> + while ((i2c_sta & JZ4780_I2C_STA_TFNF) && (i2c->wt_len > >> 0)) { >> i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA); >> data = *i2c->wbuf; >> data &= ~JZ4780_I2C_DC_READ; >> - jz4780_i2c_writew(i2c, JZ4780_I2C_DC, >> - data); >> + if ((!i2c->stop_hold) && (i2c->version >= ID_X1000)) >> + data |= X1000_I2C_DC_STOP; >> + jz4780_i2c_writew(i2c, JZ4780_I2C_DC, data); >> i2c->wbuf++; >> i2c->wt_len--; >> } >> >> if (i2c->wt_len == 0) { >> - if (!i2c->stop_hold) { >> - tmp = jz4780_i2c_readw(i2c, >> - JZ4780_I2C_CTRL); >> + if ((!i2c->stop_hold) && (i2c->version < ID_X1000)) { >> + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> tmp &= ~JZ4780_I2C_CTRL_STPHLD; >> - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, >> - tmp); >> + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> } >> >> jz4780_i2c_trans_done(i2c); >> @@ -567,20 +603,22 @@ static inline int jz4780_i2c_xfer_read(struct >> jz4780_i2c *i2c, >> i2c->rd_data_xfered = 0; >> i2c->rd_cmd_xfered = 0; >> >> - if (len <= JZ4780_I2C_FIFO_LEN) >> + if (len <= i2c->cdata->fifosize) >> jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, len - 1); >> else >> - jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, RX_LEVEL); >> + jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, i2c->cdata->rx_level); >> >> - jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, TX_LEVEL); >> + jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, i2c->cdata->tx_level); >> >> jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, >> JZ4780_I2C_INTM_MRXFL | JZ4780_I2C_INTM_MTXEMP >> | JZ4780_I2C_INTM_MTXABT | JZ4780_I2C_INTM_MRXOF); >> >> - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> - tmp |= JZ4780_I2C_CTRL_STPHLD; >> - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + if (i2c->version < ID_X1000) { >> + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> + tmp |= JZ4780_I2C_CTRL_STPHLD; >> + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + } >> >> spin_unlock_irqrestore(&i2c->lock, flags); >> >> @@ -626,14 +664,16 @@ static inline int jz4780_i2c_xfer_write(struct >> jz4780_i2c *i2c, >> i2c->wbuf = buf; >> i2c->wt_len = len; >> >> - jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, TX_LEVEL); >> + jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, i2c->cdata->tx_level); >> >> jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, JZ4780_I2C_INTM_MTXEMP >> | JZ4780_I2C_INTM_MTXABT); >> >> - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> - tmp |= JZ4780_I2C_CTRL_STPHLD; >> - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + if (i2c->version < ID_X1000) { >> + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> + tmp |= JZ4780_I2C_CTRL_STPHLD; >> + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + } >> >> spin_unlock_irqrestore(&i2c->lock, flags); >> >> @@ -716,8 +756,21 @@ static const struct i2c_algorithm >> jz4780_i2c_algorithm = { >> .functionality = jz4780_i2c_functionality, >> }; >> >> +static const struct ingenic_i2c_config jz4780_i2c_config = { >> + .fifosize = JZ4780_I2C_FIFO_LEN, >> + .tx_level = JZ4780_I2C_FIFO_LEN / 2, >> + .rx_level = JZ4780_I2C_FIFO_LEN / 2 - 1, >> +}; >> + >> +static const struct ingenic_i2c_config x1000_i2c_config = { >> + .fifosize = X1000_I2C_FIFO_LEN, >> + .tx_level = X1000_I2C_FIFO_LEN / 2, >> + .rx_level = X1000_I2C_FIFO_LEN / 2 - 1, >> +}; >> + >> static const struct of_device_id jz4780_i2c_of_matches[] = { >> - { .compatible = "ingenic,jz4780-i2c", }, >> + { .compatible = "ingenic,jz4780-i2c", .data = (void *) ID_JZ4780 }, >> + { .compatible = "ingenic,x1000-i2c", .data = (void *) ID_X1000 }, > > I think in general you should pass pointers to your ingenic_i2c_config > structures directly in .data here, and have a "version" field in your > ingenic_i2c_config struct. > Sure, I will change it in v2. > >> { /* sentinel */ } >> }; >> MODULE_DEVICE_TABLE(of, jz4780_i2c_of_matches); >> @@ -729,11 +782,24 @@ static int jz4780_i2c_probe(struct >> platform_device *pdev) >> unsigned short tmp; >> struct resource *r; >> struct jz4780_i2c *i2c; >> + const struct platform_device_id *id = platform_get_device_id(pdev); >> + const struct of_device_id *of_id = of_match_device( >> + jz4780_i2c_of_matches, &pdev->dev); >> >> i2c = devm_kzalloc(&pdev->dev, sizeof(struct jz4780_i2c), >> GFP_KERNEL); >> if (!i2c) >> return -ENOMEM; >> >> + if (of_id) >> + i2c->version = (enum ingenic_i2c_version)of_id->data; >> + else >> + i2c->version = (enum ingenic_i2c_version)id->driver_data; >> + >> + if (i2c->version >= ID_X1000) >> + i2c->cdata = &x1000_i2c_config; >> + else >> + i2c->cdata = &jz4780_i2c_config; >> + > > Then you can replace all these lines with: > i2c->cdata = device_get_match_data(dev); > > And your checks on i2c->version become checks on i2c->cdata->version. > OK, will change in v2. > >> i2c->adap.owner = THIS_MODULE; >> i2c->adap.algo = &jz4780_i2c_algorithm; >> i2c->adap.algo_data = i2c; >> @@ -777,9 +843,11 @@ static int jz4780_i2c_probe(struct >> platform_device *pdev) >> >> dev_info(&pdev->dev, "Bus frequency is %d KHz\n", i2c->speed); >> >> - tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> - tmp &= ~JZ4780_I2C_CTRL_STPHLD; >> - jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + if (i2c->version < ID_X1000) { >> + tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL); >> + tmp &= ~JZ4780_I2C_CTRL_STPHLD; >> + jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp); >> + } >> >> jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0x0); >> >> @@ -809,6 +877,12 @@ static int jz4780_i2c_remove(struct >> platform_device *pdev) >> return 0; >> } >> >> +static const struct platform_device_id ingenic_i2c_ids[] = { >> + { "jz4780-i2c", ID_JZ4780 }, >> + { "x1000-i2c", ID_X1000 }, >> + {}, > > I honestly think you can drop the platform ID table. It will never be > used. > OK, just need to drop the platform ID table? Or any other changes need to be made? Thanks and best regards! > Cheers, > -Paul > >> +}; >> + >> static struct platform_driver jz4780_i2c_driver = { >> .probe = jz4780_i2c_probe, >> .remove = jz4780_i2c_remove, >> @@ -816,6 +890,7 @@ static struct platform_driver jz4780_i2c_driver = { >> .name = "jz4780-i2c", >> .of_match_table = of_match_ptr(jz4780_i2c_of_matches), >> }, >> + .id_table = ingenic_i2c_ids, >> }; >> >> module_platform_driver(jz4780_i2c_driver); >> -- >> 2.7.4 >> > ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-12-14 12:32 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2019-12-12 15:50 (unknown) 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 0/2] Add I2C support for the Ingenic X1000 SoC 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 1/2] dt-bindings: I2C: Add X1000 bindings 周琰杰 (Zhou Yanjie) 2019-12-12 15:50 ` [PATCH 2/2] I2C: JZ4780: Add support for the X1000 周琰杰 (Zhou Yanjie) 2019-12-13 21:21 ` Paul Cercueil 2019-12-14 12:32 ` zhouyanjie
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