diff --git a/drivers/serial/cpm_uart/cpm_uart.h b/drivers/serial/cpm_uart/cpm_uart.h --- a/drivers/serial/cpm_uart/cpm_uart.h +++ b/drivers/serial/cpm_uart/cpm_uart.h @@ -40,6 +40,8 @@ #define TX_NUM_FIFO 4 #define TX_BUF_SIZE 32 +#define SCC_WAIT_CLOSING 100 + struct uart_cpm_port { struct uart_port port; u16 rx_nrfifos; @@ -67,6 +69,8 @@ struct uart_cpm_port { int bits; /* Keep track of 'odd' SMC2 wirings */ int is_portb; + /* wait on close if needed */ + int wait_closing; }; extern int cpm_uart_port_map[UART_NR]; diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c --- a/drivers/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/serial/cpm_uart/cpm_uart_core.c @@ -12,6 +12,7 @@ * * Copyright (C) 2004 Freescale Semiconductor, Inc. * (C) 2004 Intracom, S.A. + * (C) 2005 MontaVista Software, Inc. by Vitaly Bordug * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -70,6 +71,20 @@ static void cpm_uart_initbd(struct uart_ /**************************************************************/ +static inline unsigned long cpu2cpm_addr(void *addr) +{ + if ((unsigned long)addr >= CPM_ADDR) + return (unsigned long)addr; + return virt_to_bus(addr); +} + +static inline void *cpm2cpu_addr(unsigned long addr) +{ + if (addr >= CPM_ADDR) + return (void *)addr; + return bus_to_virt(addr); +} + /* * Check, if transmit buffers are processed */ @@ -143,10 +158,13 @@ static void cpm_uart_start_tx(struct uar } if (cpm_uart_tx_pump(port) != 0) { - if (IS_SMC(pinfo)) + if (IS_SMC(pinfo)) { smcp->smc_smcm |= SMCM_TX; - else + smcp->smc_smcmr |= SMCMR_TEN; + } else { sccp->scc_sccm |= UART_SCCM_TX; + pinfo->sccp->scc_gsmrl |= SCC_GSMRL_ENT; + } } } @@ -243,7 +261,7 @@ static void cpm_uart_int_rx(struct uart_ } /* get pointer */ - cp = (unsigned char *)bus_to_virt(bdp->cbd_bufaddr); + cp = (unsigned char *)cpm2cpu_addr(bdp->cbd_bufaddr); /* loop through the buffer */ while (i-- > 0) { @@ -265,13 +283,14 @@ static void cpm_uart_int_rx(struct uart_ } /* End while (i--) */ /* This BD is ready to be used again. Clear status. get next */ - bdp->cbd_sc &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV); + bdp->cbd_sc &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV | BD_SC_ID); bdp->cbd_sc |= BD_SC_EMPTY; if (bdp->cbd_sc & BD_SC_WRAP) bdp = pinfo->rx_bd_base; else bdp++; + } /* End for (;;) */ /* Write back buffer pointer */ @@ -336,22 +355,22 @@ static irqreturn_t cpm_uart_int(int irq, if (IS_SMC(pinfo)) { events = smcp->smc_smce; + smcp->smc_smce = events; if (events & SMCM_BRKE) uart_handle_break(port); if (events & SMCM_RX) cpm_uart_int_rx(port, regs); if (events & SMCM_TX) cpm_uart_int_tx(port, regs); - smcp->smc_smce = events; } else { events = sccp->scc_scce; + sccp->scc_scce = events; if (events & UART_SCCM_BRKE) uart_handle_break(port); if (events & UART_SCCM_RX) cpm_uart_int_rx(port, regs); if (events & UART_SCCM_TX) cpm_uart_int_tx(port, regs); - sccp->scc_scce = events; } return (events) ? IRQ_HANDLED : IRQ_NONE; } @@ -360,6 +379,7 @@ static int cpm_uart_startup(struct uart_ { int retval; struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; + int line = pinfo - cpm_uart_ports; pr_debug("CPM uart[%d]:startup\n", port->line); @@ -376,9 +396,19 @@ static int cpm_uart_startup(struct uart_ pinfo->sccp->scc_sccm |= UART_SCCM_RX; } + if (!(pinfo->flags & FLAG_CONSOLE)) + cpm_line_cr_cmd(line,CPM_CR_INIT_TRX); return 0; } +inline void cpm_uart_wait_until_send(struct uart_cpm_port *pinfo) +{ + unsigned long target_jiffies = jiffies + pinfo->wait_closing; + + while (!time_after(jiffies, target_jiffies)) + schedule(); +} + /* * Shutdown the uart */ @@ -394,6 +424,12 @@ static void cpm_uart_shutdown(struct uar /* If the port is not the console, disable Rx and Tx. */ if (!(pinfo->flags & FLAG_CONSOLE)) { + /* Wait for all the BDs marked sent */ + while(!cpm_uart_tx_empty(port)) + schedule_timeout(2); + if(pinfo->wait_closing) + cpm_uart_wait_until_send(pinfo); + /* Stop uarts */ if (IS_SMC(pinfo)) { volatile smc_t *smcp = pinfo->smcp; @@ -569,7 +605,7 @@ static int cpm_uart_tx_pump(struct uart_ /* Pick next descriptor and fill from buffer */ bdp = pinfo->tx_cur; - p = bus_to_virt(bdp->cbd_bufaddr); + p = cpm2cpu_addr(bdp->cbd_bufaddr); *p++ = xmit->buf[xmit->tail]; bdp->cbd_datlen = 1; bdp->cbd_sc |= BD_SC_READY; @@ -595,7 +631,7 @@ static int cpm_uart_tx_pump(struct uart_ while (!(bdp->cbd_sc & BD_SC_READY) && (xmit->tail != xmit->head)) { count = 0; - p = bus_to_virt(bdp->cbd_bufaddr); + p = cpm2cpu_addr(bdp->cbd_bufaddr); while (count < pinfo->tx_fifosize) { *p++ = xmit->buf[xmit->tail]; xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); @@ -606,6 +642,7 @@ static int cpm_uart_tx_pump(struct uart_ } bdp->cbd_datlen = count; bdp->cbd_sc |= BD_SC_READY; + __asm__("eieio"); /* Get next BD. */ if (bdp->cbd_sc & BD_SC_WRAP) bdp = pinfo->tx_bd_base; @@ -643,12 +680,12 @@ static void cpm_uart_initbd(struct uart_ mem_addr = pinfo->mem_addr; bdp = pinfo->rx_cur = pinfo->rx_bd_base; for (i = 0; i < (pinfo->rx_nrfifos - 1); i++, bdp++) { - bdp->cbd_bufaddr = virt_to_bus(mem_addr); + bdp->cbd_bufaddr = cpu2cpm_addr(mem_addr); bdp->cbd_sc = BD_SC_EMPTY | BD_SC_INTRPT; mem_addr += pinfo->rx_fifosize; } - bdp->cbd_bufaddr = virt_to_bus(mem_addr); + bdp->cbd_bufaddr = cpu2cpm_addr(mem_addr); bdp->cbd_sc = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT; /* Set the physical address of the host memory @@ -658,12 +695,12 @@ static void cpm_uart_initbd(struct uart_ mem_addr = pinfo->mem_addr + L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize); bdp = pinfo->tx_cur = pinfo->tx_bd_base; for (i = 0; i < (pinfo->tx_nrfifos - 1); i++, bdp++) { - bdp->cbd_bufaddr = virt_to_bus(mem_addr); + bdp->cbd_bufaddr = cpu2cpm_addr(mem_addr); bdp->cbd_sc = BD_SC_INTRPT; mem_addr += pinfo->tx_fifosize; } - bdp->cbd_bufaddr = virt_to_bus(mem_addr); + bdp->cbd_bufaddr = cpu2cpm_addr(mem_addr); bdp->cbd_sc = BD_SC_WRAP | BD_SC_INTRPT; } @@ -763,6 +800,8 @@ static void cpm_uart_init_smc(struct uar /* Using idle charater time requires some additional tuning. */ up->smc_mrblr = pinfo->rx_fifosize; up->smc_maxidl = pinfo->rx_fifosize; + up->smc_brklen = 0; + up->smc_brkec = 0; up->smc_brkcr = 1; cpm_line_cr_cmd(line, CPM_CR_INIT_TRX); @@ -815,6 +854,10 @@ static int cpm_uart_request_port(struct return ret; cpm_uart_initbd(pinfo); + if (IS_SMC(pinfo)) + cpm_uart_init_smc(pinfo); + else + cpm_uart_init_scc(pinfo); return 0; } @@ -902,6 +945,7 @@ struct uart_cpm_port cpm_uart_ports[UART .rx_nrfifos = RX_NUM_FIFO, .rx_fifosize = RX_BUF_SIZE, .set_lineif = scc1_lineif, + .wait_closing = SCC_WAIT_CLOSING, }, [UART_SCC2] = { .port = { @@ -915,6 +959,7 @@ struct uart_cpm_port cpm_uart_ports[UART .rx_nrfifos = RX_NUM_FIFO, .rx_fifosize = RX_BUF_SIZE, .set_lineif = scc2_lineif, + .wait_closing = SCC_WAIT_CLOSING, }, [UART_SCC3] = { .port = { @@ -928,6 +973,7 @@ struct uart_cpm_port cpm_uart_ports[UART .rx_nrfifos = RX_NUM_FIFO, .rx_fifosize = RX_BUF_SIZE, .set_lineif = scc3_lineif, + .wait_closing = SCC_WAIT_CLOSING, }, [UART_SCC4] = { .port = { @@ -941,6 +987,7 @@ struct uart_cpm_port cpm_uart_ports[UART .rx_nrfifos = RX_NUM_FIFO, .rx_fifosize = RX_BUF_SIZE, .set_lineif = scc4_lineif, + .wait_closing = SCC_WAIT_CLOSING, }, }; @@ -986,7 +1033,7 @@ static void cpm_uart_console_write(struc if ((uint) (bdp->cbd_bufaddr) > (uint) CPM_ADDR) cp = (unsigned char *) (bdp->cbd_bufaddr); else - cp = bus_to_virt(bdp->cbd_bufaddr); + cp = cpm2cpu_addr(bdp->cbd_bufaddr); *cp = *s; @@ -1006,7 +1053,7 @@ static void cpm_uart_console_write(struc if ((uint) (bdp->cbd_bufaddr) > (uint) CPM_ADDR) cp = (unsigned char *) (bdp->cbd_bufaddr); else - cp = bus_to_virt(bdp->cbd_bufaddr); + cp = cpm2cpu_addr(bdp->cbd_bufaddr); *cp = 13; bdp->cbd_datlen = 1; diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/serial/cpm_uart/cpm_uart_cpm1.c --- a/drivers/serial/cpm_uart/cpm_uart_cpm1.c +++ b/drivers/serial/cpm_uart/cpm_uart_cpm1.c @@ -82,6 +82,16 @@ void cpm_line_cr_cmd(int line, int cmd) void smc1_lineif(struct uart_cpm_port *pinfo) { volatile cpm8xx_t *cp = cpmp; + +#if defined (CONFIG_MPC885ADS) + /* Enable SMC1 transceivers */ + { + cp->cp_pepar |= 0x000000c0; + cp->cp_pedir &= ~0x000000c0; + cp->cp_peso &= ~0x00000040; + cp->cp_peso |= 0x00000080; + } +#elif defined (CONFIG_MPC86XADS) unsigned int iobits = 0x000000c0; if (!pinfo->is_portb) { @@ -93,41 +103,31 @@ void smc1_lineif(struct uart_cpm_port *p ((immap_t *)IMAP_ADDR)->im_ioport.iop_padir &= ~iobits; ((immap_t *)IMAP_ADDR)->im_ioport.iop_paodr &= ~iobits; } - -#ifdef CONFIG_MPC885ADS - /* Enable SMC1 transceivers */ - { - volatile uint __iomem *bcsr1 = ioremap(BCSR1, 4); - uint tmp; - - tmp = in_be32(bcsr1); - tmp &= ~BCSR1_RS232EN_1; - out_be32(bcsr1, tmp); - iounmap(bcsr1); - } #endif - pinfo->brg = 1; } void smc2_lineif(struct uart_cpm_port *pinfo) { -#ifdef CONFIG_MPC885ADS volatile cpm8xx_t *cp = cpmp; - volatile uint __iomem *bcsr1; - uint tmp; - +#if defined (CONFIG_MPC885ADS) cp->cp_pepar |= 0x00000c00; cp->cp_pedir &= ~0x00000c00; cp->cp_peso &= ~0x00000400; cp->cp_peso |= 0x00000800; +#elif defined (CONFIG_MPC86XADS) + unsigned int iobits = 0x00000c00; + + if (!pinfo->is_portb) { + cp->cp_pbpar |= iobits; + cp->cp_pbdir &= ~iobits; + cp->cp_pbodr &= ~iobits; + } else { + ((immap_t *)IMAP_ADDR)->im_ioport.iop_papar |= iobits; + ((immap_t *)IMAP_ADDR)->im_ioport.iop_padir &= ~iobits; + ((immap_t *)IMAP_ADDR)->im_ioport.iop_paodr &= ~iobits; + } - /* Enable SMC2 transceivers */ - bcsr1 = ioremap(BCSR1, 4); - tmp = in_be32(bcsr1); - tmp &= ~BCSR1_RS232EN_2; - out_be32(bcsr1, tmp); - iounmap(bcsr1); #endif pinfo->brg = 2;