diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc8xx')
| -rw-r--r-- | arch/powerpc/cpu/mpc8xx/Makefile | 1 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xx/serial.c | 279 |
2 files changed, 0 insertions, 280 deletions
diff --git a/arch/powerpc/cpu/mpc8xx/Makefile b/arch/powerpc/cpu/mpc8xx/Makefile index 173cf01869..b40bffb047 100644 --- a/arch/powerpc/cpu/mpc8xx/Makefile +++ b/arch/powerpc/cpu/mpc8xx/Makefile @@ -13,5 +13,4 @@ obj-$(CONFIG_OF_LIBFDT) += fdt.o obj-$(CONFIG_CMD_IMMAP) += immap.o obj-y += interrupts.o obj-$(CONFIG_CMD_REGINFO) += reginfo.o -obj-y += serial.o obj-y += speed.o diff --git a/arch/powerpc/cpu/mpc8xx/serial.c b/arch/powerpc/cpu/mpc8xx/serial.c deleted file mode 100644 index 114dfe9b4b..0000000000 --- a/arch/powerpc/cpu/mpc8xx/serial.c +++ /dev/null @@ -1,279 +0,0 @@ -/* - * (C) Copyright 2000 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <commproc.h> -#include <command.h> -#include <serial.h> -#include <watchdog.h> -#include <linux/compiler.h> - -DECLARE_GLOBAL_DATA_PTR; - -#if !defined(CONFIG_8xx_CONS_NONE) /* No Console at all */ - -#if defined(CONFIG_8xx_CONS_SMC1) /* Console on SMC1 */ -#define SMC_INDEX 0 -#define PROFF_SMC PROFF_SMC1 -#define CPM_CR_CH_SMC CPM_CR_CH_SMC1 -#define IOPINS 0xc0 - -#elif defined(CONFIG_8xx_CONS_SMC2) /* Console on SMC2 */ -#define SMC_INDEX 1 -#define PROFF_SMC PROFF_SMC2 -#define CPM_CR_CH_SMC CPM_CR_CH_SMC2 -#define IOPINS 0xc00 - -#endif /* CONFIG_8xx_CONS_SMCx */ - -#if !defined(CONFIG_SYS_SMC_RXBUFLEN) -#define CONFIG_SYS_SMC_RXBUFLEN 1 -#define CONFIG_SYS_MAXIDLE 0 -#else -#if !defined(CONFIG_SYS_MAXIDLE) -#error "you must define CONFIG_SYS_MAXIDLE" -#endif -#endif - -struct serialbuffer { - cbd_t rxbd; /* Rx BD */ - cbd_t txbd; /* Tx BD */ - uint rxindex; /* index for next character to read */ - uchar rxbuf[CONFIG_SYS_SMC_RXBUFLEN];/* rx buffers */ - uchar txbuf; /* tx buffers */ -}; - -static void serial_setdivisor(cpm8xx_t __iomem *cp) -{ - int divisor = (gd->cpu_clk + 8 * gd->baudrate) / 16 / gd->baudrate; - - if (divisor / 16 > 0x1000) { - /* bad divisor, assume 50MHz clock and 9600 baud */ - divisor = (50 * 1000 * 1000 + 8 * 9600) / 16 / 9600; - } - -#ifdef CONFIG_SYS_BRGCLK_PRESCALE - divisor /= CONFIG_SYS_BRGCLK_PRESCALE; -#endif - - if (divisor <= 0x1000) - out_be32(&cp->cp_brgc1, ((divisor - 1) << 1) | CPM_BRG_EN); - else - out_be32(&cp->cp_brgc1, ((divisor / 16 - 1) << 1) | CPM_BRG_EN | - CPM_BRG_DIV16); -} - -/* - * Minimal serial functions needed to use one of the SMC ports - * as serial console interface. - */ - -static void smc_setbrg(void) -{ - immap_t __iomem *im = (immap_t __iomem *)CONFIG_SYS_IMMR; - cpm8xx_t __iomem *cp = &(im->im_cpm); - - /* Set up the baud rate generator. - * See 8xx_io/commproc.c for details. - * - * Wire BRG1 to SMCx - */ - - out_be32(&cp->cp_simode, 0); - - serial_setdivisor(cp); -} - -static int smc_init(void) -{ - immap_t __iomem *im = (immap_t __iomem *)CONFIG_SYS_IMMR; - smc_t __iomem *sp; - smc_uart_t __iomem *up; - cpm8xx_t __iomem *cp = &(im->im_cpm); - struct serialbuffer __iomem *rtx; - - /* initialize pointers to SMC */ - - sp = cp->cp_smc + SMC_INDEX; - up = (smc_uart_t __iomem *)&cp->cp_dparam[PROFF_SMC]; - /* Disable relocation */ - out_be16(&up->smc_rpbase, 0); - - /* Disable transmitter/receiver. */ - clrbits_be16(&sp->smc_smcmr, SMCMR_REN | SMCMR_TEN); - - /* Enable SDMA. */ - out_be32(&im->im_siu_conf.sc_sdcr, 1); - - /* clear error conditions */ -#ifdef CONFIG_SYS_SDSR - out_8(&im->im_sdma.sdma_sdsr, CONFIG_SYS_SDSR); -#else - out_8(&im->im_sdma.sdma_sdsr, 0x83); -#endif - - /* clear SDMA interrupt mask */ -#ifdef CONFIG_SYS_SDMR - out_8(&im->im_sdma.sdma_sdmr, CONFIG_SYS_SDMR); -#else - out_8(&im->im_sdma.sdma_sdmr, 0x00); -#endif - - /* Use Port B for SMCx instead of other functions. */ - setbits_be32(&cp->cp_pbpar, IOPINS); - clrbits_be32(&cp->cp_pbdir, IOPINS); - clrbits_be16(&cp->cp_pbodr, IOPINS); - - /* Set the physical address of the host memory buffers in - * the buffer descriptors. - */ - rtx = (struct serialbuffer __iomem *)&cp->cp_dpmem[CPM_SERIAL_BASE]; - /* 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. - * damm: allocating space after the two buffers for rx/tx data - */ - - out_be32(&rtx->rxbd.cbd_bufaddr, (__force uint)&rtx->rxbuf); - out_be16(&rtx->rxbd.cbd_sc, 0); - - out_be32(&rtx->txbd.cbd_bufaddr, (__force uint)&rtx->txbuf); - out_be16(&rtx->txbd.cbd_sc, 0); - - /* Set up the uart parameters in the parameter ram. */ - out_be16(&up->smc_rbase, CPM_SERIAL_BASE); - out_be16(&up->smc_tbase, CPM_SERIAL_BASE + sizeof(cbd_t)); - out_8(&up->smc_rfcr, SMC_EB); - out_8(&up->smc_tfcr, SMC_EB); - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - out_be16(&sp->smc_smcmr, smcr_mk_clen(9) | SMCMR_SM_UART); - - /* Mask all interrupts and remove anything pending. - */ - out_8(&sp->smc_smcm, 0); - out_8(&sp->smc_smce, 0xff); - - /* Set up the baud rate generator */ - smc_setbrg(); - - /* Make the first buffer the only buffer. */ - setbits_be16(&rtx->txbd.cbd_sc, BD_SC_WRAP); - setbits_be16(&rtx->rxbd.cbd_sc, BD_SC_EMPTY | BD_SC_WRAP); - - /* single/multi character receive. */ - out_be16(&up->smc_mrblr, CONFIG_SYS_SMC_RXBUFLEN); - out_be16(&up->smc_maxidl, CONFIG_SYS_MAXIDLE); - out_be32(&rtx->rxindex, 0); - - /* Initialize Tx/Rx parameters. */ - while (in_be16(&cp->cp_cpcr) & CPM_CR_FLG) /* wait if cp is busy */ - ; - - out_be16(&cp->cp_cpcr, - mk_cr_cmd(CPM_CR_CH_SMC, CPM_CR_INIT_TRX) | CPM_CR_FLG); - - while (in_be16(&cp->cp_cpcr) & CPM_CR_FLG) /* wait if cp is busy */ - ; - - /* Enable transmitter/receiver. */ - setbits_be16(&sp->smc_smcmr, SMCMR_REN | SMCMR_TEN); - - return 0; -} - -static void smc_putc(const char c) -{ - immap_t __iomem *im = (immap_t __iomem *)CONFIG_SYS_IMMR; - cpm8xx_t __iomem *cpmp = &(im->im_cpm); - struct serialbuffer __iomem *rtx; - - if (c == '\n') - smc_putc('\r'); - - rtx = (struct serialbuffer __iomem *)&cpmp->cp_dpmem[CPM_SERIAL_BASE]; - - /* Wait for last character to go. */ - out_8(&rtx->txbuf, c); - out_be16(&rtx->txbd.cbd_datlen, 1); - setbits_be16(&rtx->txbd.cbd_sc, BD_SC_READY); - - while (in_be16(&rtx->txbd.cbd_sc) & BD_SC_READY) - WATCHDOG_RESET(); -} - -static void smc_puts(const char *s) -{ - while (*s) - smc_putc(*s++); -} - -static int smc_getc(void) -{ - immap_t __iomem *im = (immap_t __iomem *)CONFIG_SYS_IMMR; - cpm8xx_t __iomem *cpmp = &(im->im_cpm); - struct serialbuffer __iomem *rtx; - unsigned char c; - uint rxindex; - - rtx = (struct serialbuffer __iomem *)&cpmp->cp_dpmem[CPM_SERIAL_BASE]; - - /* Wait for character to show up. */ - while (in_be16(&rtx->rxbd.cbd_sc) & BD_SC_EMPTY) - WATCHDOG_RESET(); - - /* the characters are read one by one, - * use the rxindex to know the next char to deliver - */ - rxindex = in_be32(&rtx->rxindex); - c = in_8(rtx->rxbuf + rxindex); - rxindex++; - - /* check if all char are readout, then make prepare for next receive */ - if (rxindex >= in_be16(&rtx->rxbd.cbd_datlen)) { - rxindex = 0; - setbits_be16(&rtx->rxbd.cbd_sc, BD_SC_EMPTY); - } - out_be32(&rtx->rxindex, rxindex); - return c; -} - -static int smc_tstc(void) -{ - immap_t __iomem *im = (immap_t __iomem *)CONFIG_SYS_IMMR; - cpm8xx_t __iomem *cpmp = &(im->im_cpm); - struct serialbuffer __iomem *rtx; - - rtx = (struct serialbuffer __iomem *)&cpmp->cp_dpmem[CPM_SERIAL_BASE]; - - return !(in_be16(&rtx->rxbd.cbd_sc) & BD_SC_EMPTY); -} - -struct serial_device serial_smc_device = { - .name = "serial_smc", - .start = smc_init, - .stop = NULL, - .setbrg = smc_setbrg, - .getc = smc_getc, - .tstc = smc_tstc, - .putc = smc_putc, - .puts = smc_puts, -}; - -__weak struct serial_device *default_serial_console(void) -{ - return &serial_smc_device; -} - -void mpc8xx_serial_initialize(void) -{ - serial_register(&serial_smc_device); -} - -#endif /* CONFIG_8xx_CONS_NONE */ |