/* * linux/drivers/serial/cpm_uart.c * * Driver for CPM (SCC/SMC) serial ports; CPM1 definitions * * Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2) * Pantelis Antoniou (panto@intracom.gr) (CPM1) * * Copyright (C) 2004 Freescale Semiconductor, Inc. * (C) 2004 Intracom, S.A. * (C) 2006 MontaVista Software, Inc. * Vitaly Bordug <vbordug@ru.mvista.com> * * 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 * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <linux/module.h> #include <linux/tty.h> #include <linux/ioport.h> #include <linux/init.h> #include <linux/serial.h> #include <linux/console.h> #include <linux/sysrq.h> #include <linux/device.h> #include <linux/bootmem.h> #include <linux/dma-mapping.h> #include <asm/io.h> #include <asm/irq.h> #include <linux/serial_core.h> #include <linux/kernel.h> #include "cpm_uart.h" /**************************************************************/ void cpm_line_cr_cmd(int line, int cmd) { ushort val; volatile cpm8xx_t *cp = cpmp; switch (line) { case UART_SMC1: val = mk_cr_cmd(CPM_CR_CH_SMC1, cmd) | CPM_CR_FLG; break; case UART_SMC2: val = mk_cr_cmd(CPM_CR_CH_SMC2, cmd) | CPM_CR_FLG; break; case UART_SCC1: val = mk_cr_cmd(CPM_CR_CH_SCC1, cmd) | CPM_CR_FLG; break; case UART_SCC2: val = mk_cr_cmd(CPM_CR_CH_SCC2, cmd) | CPM_CR_FLG; break; case UART_SCC3: val = mk_cr_cmd(CPM_CR_CH_SCC3, cmd) | CPM_CR_FLG; break; case UART_SCC4: val = mk_cr_cmd(CPM_CR_CH_SCC4, cmd) | CPM_CR_FLG; break; default: return; } cp->cp_cpcr = val; while (cp->cp_cpcr & CPM_CR_FLG) ; } void smc1_lineif(struct uart_cpm_port *pinfo) { pinfo->brg = 1; } void smc2_lineif(struct uart_cpm_port *pinfo) { pinfo->brg = 2; } void scc1_lineif(struct uart_cpm_port *pinfo) { /* XXX SCC1: insert port configuration here */ pinfo->brg = 1; } void scc2_lineif(struct uart_cpm_port *pinfo) { /* XXX SCC2: insert port configuration here */ pinfo->brg = 2; } void scc3_lineif(struct uart_cpm_port *pinfo) { /* XXX SCC3: insert port configuration here */ pinfo->brg = 3; } void scc4_lineif(struct uart_cpm_port *pinfo) { /* XXX SCC4: insert port configuration here */ pinfo->brg = 4; } /* * Allocate DP-Ram and memory buffers. We need to allocate a transmit and * receive buffer descriptors from dual port ram, and a character * buffer area from host mem. If we are allocating for the console we need * to do it from bootmem */ int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con) { int dpmemsz, memsz; u8 *dp_mem; uint dp_offset; u8 *mem_addr; dma_addr_t dma_addr = 0; pr_debug("CPM uart[%d]:allocbuf\n", pinfo->port.line); dpmemsz = sizeof(cbd_t) * (pinfo->rx_nrfifos + pinfo->tx_nrfifos); dp_offset = cpm_dpalloc(dpmemsz, 8); if (IS_DPERR(dp_offset)) { printk(KERN_ERR "cpm_uart_cpm1.c: could not allocate buffer descriptors\n"); return -ENOMEM; } dp_mem = cpm_dpram_addr(dp_offset); memsz = L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize) + L1_CACHE_ALIGN(pinfo->tx_nrfifos * pinfo->tx_fifosize); if (is_con) { /* was hostalloc but changed cause it blows away the */ /* large tlb mapping when pinning the kernel area */ mem_addr = (u8 *) cpm_dpram_addr(cpm_dpalloc(memsz, 8)); dma_addr = (u32)mem_addr; } else mem_addr = dma_alloc_coherent(NULL, memsz, &dma_addr, GFP_KERNEL); if (mem_addr == NULL) { cpm_dpfree(dp_offset); printk(KERN_ERR "cpm_uart_cpm1.c: could not allocate coherent memory\n"); return -ENOMEM; } pinfo->dp_addr = dp_offset; pinfo->mem_addr = mem_addr; /* virtual address*/ pinfo->dma_addr = dma_addr; /* physical address*/ pinfo->mem_size = memsz; pinfo->rx_buf = mem_addr; pinfo->tx_buf = pinfo->rx_buf + L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize); pinfo->rx_bd_base = (volatile cbd_t *)dp_mem; pinfo->tx_bd_base = pinfo->rx_bd_base + pinfo->rx_nrfifos; return 0; } void cpm_uart_freebuf(struct uart_cpm_port *pinfo) { dma_free_coherent(NULL, L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize) + L1_CACHE_ALIGN(pinfo->tx_nrfifos * pinfo->tx_fifosize), pinfo->mem_addr, pinfo->dma_addr); cpm_dpfree(pinfo->dp_addr); } /* Setup any dynamic params in the uart desc */ int cpm_uart_init_portdesc(void) { pr_debug("CPM uart[-]:init portdesc\n"); cpm_uart_nr = 0; #ifdef CONFIG_SERIAL_CPM_SMC1 cpm_uart_ports[UART_SMC1].smcp = &cpmp->cp_smc[0]; /* * Is SMC1 being relocated? */ # ifdef CONFIG_I2C_SPI_SMC1_UCODE_PATCH cpm_uart_ports[UART_SMC1].smcup = (smc_uart_t *) & cpmp->cp_dparam[0x3C0]; # else cpm_uart_ports[UART_SMC1].smcup = (smc_uart_t *) & cpmp->cp_dparam[PROFF_SMC1]; # endif cpm_uart_ports[UART_SMC1].port.mapbase = (unsigned long)&cpmp->cp_smc[0]; cpm_uart_ports[UART_SMC1].smcp->smc_smcm |= (SMCM_RX | SMCM_TX); cpm_uart_ports[UART_SMC1].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); cpm_uart_ports[UART_SMC1].port.uartclk = (((bd_t *) __res)->bi_intfreq); cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1; #endif #ifdef CONFIG_SERIAL_CPM_SMC2 cpm_uart_ports[UART_SMC2].smcp = &cpmp->cp_smc[1]; cpm_uart_ports[UART_SMC2].smcup = (smc_uart_t *) & cpmp->cp_dparam[PROFF_SMC2]; cpm_uart_ports[UART_SMC2].port.mapbase = (unsigned long)&cpmp->cp_smc[1]; cpm_uart_ports[UART_SMC2].smcp->smc_smcm |= (SMCM_RX | SMCM_TX); cpm_uart_ports[UART_SMC2].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); cpm_uart_ports[UART_SMC2].port.uartclk = (((bd_t *) __res)->bi_intfreq); cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2; #endif #ifdef CONFIG_SERIAL_CPM_SCC1 cpm_uart_ports[UART_SCC1].sccp = &cpmp->cp_scc[0]; cpm_uart_ports[UART_SCC1].sccup = (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC1]; cpm_uart_ports[UART_SCC1].port.mapbase = (unsigned long)&cpmp->cp_scc[0]; cpm_uart_ports[UART_SCC1].sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX); cpm_uart_ports[UART_SCC1].sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); cpm_uart_ports[UART_SCC1].port.uartclk = (((bd_t *) __res)->bi_intfreq); cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1; #endif #ifdef CONFIG_SERIAL_CPM_SCC2 cpm_uart_ports[UART_SCC2].sccp = &cpmp->cp_scc[1]; cpm_uart_ports[UART_SCC2].sccup = (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC2]; cpm_uart_ports[UART_SCC2].port.mapbase = (unsigned long)&cpmp->cp_scc[1]; cpm_uart_ports[UART_SCC2].sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX); cpm_uart_ports[UART_SCC2].sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); cpm_uart_ports[UART_SCC2].port.uartclk = (((bd_t *) __res)->bi_intfreq); cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2; #endif #ifdef CONFIG_SERIAL_CPM_SCC3 cpm_uart_ports[UART_SCC3].sccp = &cpmp->cp_scc[2]; cpm_uart_ports[UART_SCC3].sccup = (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC3]; cpm_uart_ports[UART_SCC3].port.mapbase = (unsigned long)&cpmp->cp_scc[2]; cpm_uart_ports[UART_SCC3].sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX); cpm_uart_ports[UART_SCC3].sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); cpm_uart_ports[UART_SCC3].port.uartclk = (((bd_t *) __res)->bi_intfreq); cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3; #endif #ifdef CONFIG_SERIAL_CPM_SCC4 cpm_uart_ports[UART_SCC4].sccp = &cpmp->cp_scc[3]; cpm_uart_ports[UART_SCC4].sccup = (scc_uart_t *) & cpmp->cp_dparam[PROFF_SCC4]; cpm_uart_ports[UART_SCC4].port.mapbase = (unsigned long)&cpmp->cp_scc[3]; cpm_uart_ports[UART_SCC4].sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX); cpm_uart_ports[UART_SCC4].sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); cpm_uart_ports[UART_SCC4].port.uartclk = (((bd_t *) __res)->bi_intfreq); cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4; #endif return 0; }