+++ /dev/null
-/* 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));
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff