|  | /* | 
|  | *  linux/drivers/serial/cpm_uart.c | 
|  | * | 
|  | *  Driver for CPM (SCC/SMC) serial ports; CPM1 definitions | 
|  | * | 
|  | *  Maintainer: Kumar Gala (kumar.gala@freescale.com) (CPM2) | 
|  | *              Pantelis Antoniou (panto@intracom.gr) (CPM1) | 
|  | * | 
|  | *  Copyright (C) 2004 Freescale Semiconductor, Inc. | 
|  | *            (C) 2004 Intracom, S.A. | 
|  | * | 
|  | * 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/config.h> | 
|  | #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) | 
|  | { | 
|  | volatile cpm8xx_t *cp = cpmp; | 
|  |  | 
|  | (void)cp;	/* fix warning */ | 
|  | #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) { | 
|  | 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; | 
|  | } | 
|  | #endif | 
|  | pinfo->brg = 1; | 
|  | } | 
|  |  | 
|  | void smc2_lineif(struct uart_cpm_port *pinfo) | 
|  | { | 
|  | volatile cpm8xx_t *cp = cpmp; | 
|  |  | 
|  | (void)cp;	/* fix warning */ | 
|  | #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; | 
|  | } | 
|  |  | 
|  | #endif | 
|  |  | 
|  | 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 = 0; | 
|  | } 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; | 
|  | pinfo->dma_addr = dma_addr; | 
|  |  | 
|  | 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; | 
|  | } |