diff options
Diffstat (limited to 'arch/ppc/boot/simple/m8xx_tty.c')
| -rw-r--r-- | arch/ppc/boot/simple/m8xx_tty.c | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/arch/ppc/boot/simple/m8xx_tty.c b/arch/ppc/boot/simple/m8xx_tty.c deleted file mode 100644 index f28924e..0000000 --- a/arch/ppc/boot/simple/m8xx_tty.c +++ /dev/null @@ -1,289 +0,0 @@ -/* Minimal serial functions needed to send messages out the serial - * port on the MBX console. - * - * The MBX uses SMC1 for the serial port. We reset the port and use - * only the first BD that EPPC-Bug set up as a character FIFO. - * - * Later versions (at least 1.4, maybe earlier) of the MBX EPPC-Bug - * use COM1 instead of SMC1 as the console port. This kinda sucks - * for the rest of the kernel, so here we force the use of SMC1 again. - */ -#include <linux/types.h> -#include <asm/uaccess.h> -#include <asm/mpc8xx.h> -#include <asm/cpm1.h> - -#ifdef CONFIG_MBX -#define MBX_CSR1 ((volatile u_char *)0xfa100000) -#define CSR1_COMEN (u_char)0x02 -#endif - -#ifdef TQM_SMC2_CONSOLE -#define PROFF_CONS PROFF_SMC2 -#define CPM_CR_CH_CONS CPM_CR_CH_SMC2 -#define SMC_INDEX 1 -static volatile iop8xx_t *iopp = (iop8xx_t *)&(((immap_t *)IMAP_ADDR)->im_ioport); -#else -#define PROFF_CONS PROFF_SMC1 -#define CPM_CR_CH_CONS CPM_CR_CH_SMC1 -#define SMC_INDEX 0 -#endif - -static cpm8xx_t *cpmp = (cpm8xx_t *)&(((immap_t *)IMAP_ADDR)->im_cpm); - -unsigned long -serial_init(int ignored, bd_t *bd) -{ - volatile smc_t *sp; - volatile smc_uart_t *up; - volatile cbd_t *tbdf, *rbdf; - volatile cpm8xx_t *cp; - uint dpaddr, memaddr; -#ifndef CONFIG_MBX - uint ui; -#endif - - cp = cpmp; - sp = (smc_t*)&(cp->cp_smc[SMC_INDEX]); - up = (smc_uart_t *)&cp->cp_dparam[PROFF_CONS]; - - /* Disable transmitter/receiver. - */ - sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); - -#ifdef CONFIG_FADS - /* Enable SMC1/2 transceivers. - */ - *((volatile uint *)BCSR1) &= ~(BCSR1_RS232EN_1|BCSR1_RS232EN_2); -#endif - -#ifndef CONFIG_MBX - { - /* Initialize SMCx and use it for the console port. - */ - - /* Enable SDMA. - */ - ((immap_t *)IMAP_ADDR)->im_siu_conf.sc_sdcr = 1; - -#ifdef TQM_SMC2_CONSOLE - /* Use Port A for SMC2 instead of other functions. - */ - iopp->iop_papar |= 0x00c0; - iopp->iop_padir &= ~0x00c0; - iopp->iop_paodr &= ~0x00c0; -#else - /* Use Port B for SMCs instead of other functions. - */ - cp->cp_pbpar |= 0x00000cc0; - cp->cp_pbdir &= ~0x00000cc0; - cp->cp_pbodr &= ~0x00000cc0; -#endif - - /* Allocate space for two buffer descriptors in the DP ram. - * For now, this address seems OK, but it may have to - * change with newer versions of the firmware. - */ - dpaddr = 0x0800; - - /* Grab a few bytes from the top of memory for SMC FIFOs. - */ - memaddr = (bd->bi_memsize - 32) & ~15; - - /* Set the physical address of the host memory buffers in - * the buffer descriptors. - */ - rbdf = (cbd_t *)&cp->cp_dpmem[dpaddr]; - rbdf->cbd_bufaddr = memaddr; - rbdf->cbd_sc = 0; - tbdf = rbdf + 1; - tbdf->cbd_bufaddr = memaddr+4; - tbdf->cbd_sc = 0; - - /* Set up the uart parameters in the parameter ram. - */ - up->smc_rbase = dpaddr; - up->smc_tbase = dpaddr+sizeof(cbd_t); - up->smc_rfcr = SMC_EB; - up->smc_tfcr = SMC_EB; - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; - - /* Mask all interrupts and remove anything pending. - */ - sp->smc_smcm = 0; - sp->smc_smce = 0xff; - - /* Set up the baud rate generator. - * See 8xx_io/commproc.c for details. - * This wires BRG1 to SMC1 and BRG2 to SMC2; - */ - cp->cp_simode = 0x10000000; - ui = bd->bi_intfreq / 16 / bd->bi_baudrate; -#ifdef TQM_SMC2_CONSOLE - cp->cp_brgc2 = -#else - cp->cp_brgc1 = -#endif - ((ui - 1) < 4096) - ? (((ui - 1) << 1) | CPM_BRG_EN) - : ((((ui / 16) - 1) << 1) | CPM_BRG_EN | CPM_BRG_DIV16); - -#else /* CONFIG_MBX */ - if (*MBX_CSR1 & CSR1_COMEN) { - /* COM1 is enabled. Initialize SMC1 and use it for - * the console port. - */ - - /* Enable SDMA. - */ - ((immap_t *)IMAP_ADDR)->im_siu_conf.sc_sdcr = 1; - - /* Use Port B for SMCs instead of other functions. - */ - cp->cp_pbpar |= 0x00000cc0; - cp->cp_pbdir &= ~0x00000cc0; - cp->cp_pbodr &= ~0x00000cc0; - - /* Allocate space for two buffer descriptors in the DP ram. - * For now, this address seems OK, but it may have to - * change with newer versions of the firmware. - */ - dpaddr = 0x0800; - - /* Grab a few bytes from the top of memory. EPPC-Bug isn't - * running any more, so we can do this. - */ - memaddr = (bd->bi_memsize - 32) & ~15; - - /* Set the physical address of the host memory buffers in - * the buffer descriptors. - */ - rbdf = (cbd_t *)&cp->cp_dpmem[dpaddr]; - rbdf->cbd_bufaddr = memaddr; - rbdf->cbd_sc = 0; - tbdf = rbdf + 1; - tbdf->cbd_bufaddr = memaddr+4; - tbdf->cbd_sc = 0; - - /* Set up the uart parameters in the parameter ram. - */ - up->smc_rbase = dpaddr; - up->smc_tbase = dpaddr+sizeof(cbd_t); - up->smc_rfcr = SMC_EB; - up->smc_tfcr = SMC_EB; - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; - - /* Mask all interrupts and remove anything pending. - */ - sp->smc_smcm = 0; - sp->smc_smce = 0xff; - - /* Set up the baud rate generator. - * See 8xx_io/commproc.c for details. - */ - cp->cp_simode = 0x10000000; - cp->cp_brgc1 = - (((bd->bi_intfreq/16) / 9600) << 1) | CPM_BRG_EN; - - /* Enable SMC1 for console output. - */ - *MBX_CSR1 &= ~CSR1_COMEN; - } - else { -#endif /* ndef CONFIG_MBX */ - /* SMCx is used as console port. - */ - tbdf = (cbd_t *)&cp->cp_dpmem[up->smc_tbase]; - rbdf = (cbd_t *)&cp->cp_dpmem[up->smc_rbase]; - - /* Issue a stop transmit, and wait for it. - */ - cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_CONS, - CPM_CR_STOP_TX) | CPM_CR_FLG; - while (cp->cp_cpcr & CPM_CR_FLG); - } - - /* Make the first buffer the only buffer. - */ - tbdf->cbd_sc |= BD_SC_WRAP; - rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP; - - /* Single character receive. - */ - up->smc_mrblr = 1; - up->smc_maxidl = 0; - - /* Initialize Tx/Rx parameters. - */ - cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_CONS, CPM_CR_INIT_TRX) | CPM_CR_FLG; - while (cp->cp_cpcr & CPM_CR_FLG); - - /* Enable transmitter/receiver. - */ - sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; - - /* This is ignored. - */ - return 0; -} - -void -serial_putc(void *ignored, const char c) -{ - volatile cbd_t *tbdf; - volatile char *buf; - volatile smc_uart_t *up; - - up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_CONS]; - tbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_tbase]; - - /* Wait for last character to go. - */ - buf = (char *)tbdf->cbd_bufaddr; - while (tbdf->cbd_sc & BD_SC_READY); - - *buf = c; - tbdf->cbd_datlen = 1; - tbdf->cbd_sc |= BD_SC_READY; -} - -char -serial_getc(void *ignored) -{ - volatile cbd_t *rbdf; - volatile char *buf; - volatile smc_uart_t *up; - char c; - - up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_CONS]; - rbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_rbase]; - - /* Wait for character to show up. - */ - buf = (char *)rbdf->cbd_bufaddr; - while (rbdf->cbd_sc & BD_SC_EMPTY); - c = *buf; - rbdf->cbd_sc |= BD_SC_EMPTY; - - return(c); -} - -int -serial_tstc(void *ignored) -{ - volatile cbd_t *rbdf; - volatile smc_uart_t *up; - - up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_CONS]; - rbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_rbase]; - - return(!(rbdf->cbd_sc & BD_SC_EMPTY)); -} |
