summaryrefslogtreecommitdiff
path: root/arch/powerpc/cpu/mpc512x/serial.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/cpu/mpc512x/serial.c')
-rw-r--r--arch/powerpc/cpu/mpc512x/serial.c431
1 files changed, 0 insertions, 431 deletions
diff --git a/arch/powerpc/cpu/mpc512x/serial.c b/arch/powerpc/cpu/mpc512x/serial.c
deleted file mode 100644
index ac77ddc..0000000
--- a/arch/powerpc/cpu/mpc512x/serial.c
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * (C) Copyright 2000 - 2010
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * SPDX-License-Identifier: GPL-2.0+
- *
- * Based ont the MPC5200 PSC driver.
- * Adapted for MPC512x by Jan Wrobel <wrr@semihalf.com>
- */
-
-/*
- * Minimal serial functions needed to use one of the PSC ports
- * as serial console interface.
- */
-
-#include <common.h>
-#include <linux/compiler.h>
-#include <asm/io.h>
-#include <asm/processor.h>
-#include <serial.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#if defined(CONFIG_PSC_CONSOLE)
-
-static void fifo_init (volatile psc512x_t *psc)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- u32 tfsize, rfsize;
-
- /* reset Rx & Tx fifo slice */
- out_be32(&psc->rfcmd, PSC_FIFO_RESET_SLICE);
- out_be32(&psc->tfcmd, PSC_FIFO_RESET_SLICE);
-
- /* disable Tx & Rx FIFO interrupts */
- out_be32(&psc->rfintmask, 0);
- out_be32(&psc->tfintmask, 0);
-
- switch (((u32)psc & 0xf00) >> 8) {
- case 0:
- tfsize = FIFOC_PSC0_TX_SIZE | (FIFOC_PSC0_TX_ADDR << 16);
- rfsize = FIFOC_PSC0_RX_SIZE | (FIFOC_PSC0_RX_ADDR << 16);
- break;
- case 1:
- tfsize = FIFOC_PSC1_TX_SIZE | (FIFOC_PSC1_TX_ADDR << 16);
- rfsize = FIFOC_PSC1_RX_SIZE | (FIFOC_PSC1_RX_ADDR << 16);
- break;
- case 2:
- tfsize = FIFOC_PSC2_TX_SIZE | (FIFOC_PSC2_TX_ADDR << 16);
- rfsize = FIFOC_PSC2_RX_SIZE | (FIFOC_PSC2_RX_ADDR << 16);
- break;
- case 3:
- tfsize = FIFOC_PSC3_TX_SIZE | (FIFOC_PSC3_TX_ADDR << 16);
- rfsize = FIFOC_PSC3_RX_SIZE | (FIFOC_PSC3_RX_ADDR << 16);
- break;
- case 4:
- tfsize = FIFOC_PSC4_TX_SIZE | (FIFOC_PSC4_TX_ADDR << 16);
- rfsize = FIFOC_PSC4_RX_SIZE | (FIFOC_PSC4_RX_ADDR << 16);
- break;
- case 5:
- tfsize = FIFOC_PSC5_TX_SIZE | (FIFOC_PSC5_TX_ADDR << 16);
- rfsize = FIFOC_PSC5_RX_SIZE | (FIFOC_PSC5_RX_ADDR << 16);
- break;
- case 6:
- tfsize = FIFOC_PSC6_TX_SIZE | (FIFOC_PSC6_TX_ADDR << 16);
- rfsize = FIFOC_PSC6_RX_SIZE | (FIFOC_PSC6_RX_ADDR << 16);
- break;
- case 7:
- tfsize = FIFOC_PSC7_TX_SIZE | (FIFOC_PSC7_TX_ADDR << 16);
- rfsize = FIFOC_PSC7_RX_SIZE | (FIFOC_PSC7_RX_ADDR << 16);
- break;
- case 8:
- tfsize = FIFOC_PSC8_TX_SIZE | (FIFOC_PSC8_TX_ADDR << 16);
- rfsize = FIFOC_PSC8_RX_SIZE | (FIFOC_PSC8_RX_ADDR << 16);
- break;
- case 9:
- tfsize = FIFOC_PSC9_TX_SIZE | (FIFOC_PSC9_TX_ADDR << 16);
- rfsize = FIFOC_PSC9_RX_SIZE | (FIFOC_PSC9_RX_ADDR << 16);
- break;
- case 10:
- tfsize = FIFOC_PSC10_TX_SIZE | (FIFOC_PSC10_TX_ADDR << 16);
- rfsize = FIFOC_PSC10_RX_SIZE | (FIFOC_PSC10_RX_ADDR << 16);
- break;
- case 11:
- tfsize = FIFOC_PSC11_TX_SIZE | (FIFOC_PSC11_TX_ADDR << 16);
- rfsize = FIFOC_PSC11_RX_SIZE | (FIFOC_PSC11_RX_ADDR << 16);
- break;
- default:
- return;
- }
-
- out_be32(&psc->tfsize, tfsize);
- out_be32(&psc->rfsize, rfsize);
-
- /* enable Tx & Rx FIFO slice */
- out_be32(&psc->rfcmd, PSC_FIFO_ENABLE_SLICE);
- out_be32(&psc->tfcmd, PSC_FIFO_ENABLE_SLICE);
-
- out_be32(&im->fifoc.fifoc_cmd, FIFOC_DISABLE_CLOCK_GATE);
- __asm__ volatile ("sync");
-}
-
-void serial_setbrg_dev(unsigned int idx)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
- unsigned long baseclk, div;
- unsigned long baudrate;
- char buf[16];
- char *br_env;
-
- baudrate = gd->baudrate;
- if (idx != CONFIG_PSC_CONSOLE) {
- /* Allows setting baudrate for other serial devices
- * on PSCx using environment. If not specified, use
- * the same baudrate as for console.
- */
- sprintf(buf, "psc%d_baudrate", idx);
- br_env = getenv(buf);
- if (br_env)
- baudrate = simple_strtoul(br_env, NULL, 10);
-
- debug("%s: idx %d, baudrate %ld\n", __func__, idx, baudrate);
- }
-
- /* calculate divisor for setting PSC CTUR and CTLR registers */
- baseclk = (gd->arch.ips_clk + 8) / 16;
- div = (baseclk + (baudrate / 2)) / baudrate;
-
- out_8(&psc->ctur, (div >> 8) & 0xff);
- out_8(&psc->ctlr, div & 0xff); /* set baudrate */
-}
-
-int serial_init_dev(unsigned int idx)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
- u32 reg;
-
- reg = in_be32(&im->clk.sccr[0]);
- out_be32(&im->clk.sccr[0], reg | CLOCK_SCCR1_PSC_EN(idx));
-
- fifo_init (psc);
-
- /* set MR register to point to MR1 */
- out_8(&psc->command, PSC_SEL_MODE_REG_1);
-
- /* disable Tx/Rx */
- out_8(&psc->command, PSC_TX_DISABLE | PSC_RX_DISABLE);
-
- /* choose the prescaler by 16 for the Tx/Rx clock generation */
- out_be16(&psc->psc_clock_select, 0xdd00);
-
- /* switch to UART mode */
- out_be32(&psc->sicr, 0);
-
- /* mode register points to mr1 */
- /* configure parity, bit length and so on in mode register 1*/
- out_8(&psc->mode, PSC_MODE_8_BITS | PSC_MODE_PARNONE);
- /* now, mode register points to mr2 */
- out_8(&psc->mode, PSC_MODE_1_STOPBIT);
-
- /* set baudrate */
- serial_setbrg_dev(idx);
-
- /* disable all interrupts */
- out_be16(&psc->psc_imr, 0);
-
- /* reset and enable Rx/Tx */
- out_8(&psc->command, PSC_RST_RX);
- out_8(&psc->command, PSC_RST_TX);
- out_8(&psc->command, PSC_RX_ENABLE | PSC_TX_ENABLE);
-
- return 0;
-}
-
-int serial_uninit_dev(unsigned int idx)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
- u32 reg;
-
- out_8(&psc->command, PSC_RX_DISABLE | PSC_TX_DISABLE);
- reg = in_be32(&im->clk.sccr[0]);
- reg &= ~CLOCK_SCCR1_PSC_EN(idx);
- out_be32(&im->clk.sccr[0], reg);
-
- return 0;
-}
-
-void serial_putc_dev(unsigned int idx, const char c)
-{
- volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
- volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
-
- if (c == '\n')
- serial_putc_dev(idx, '\r');
-
- /* Wait for last character to go. */
- while (!(in_be16(&psc->psc_status) & PSC_SR_TXEMP))
- ;
-
- out_8(&psc->tfdata_8, c);
-}
-
-void serial_puts_dev(unsigned int idx, const char *s)
-{
- while (*s)
- serial_putc_dev(idx, *s++);
-}
-
-int serial_getc_dev(unsigned int idx)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
-
- /* Wait for a character to arrive. */
- while (in_be32(&psc->rfstat) & PSC_FIFO_EMPTY)
- ;
-
- return in_8(&psc->rfdata_8);
-}
-
-int serial_tstc_dev(unsigned int idx)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
-
- return !(in_be32(&psc->rfstat) & PSC_FIFO_EMPTY);
-}
-
-void serial_setrts_dev(unsigned int idx, int s)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
-
- if (s) {
- /* Assert RTS (become LOW) */
- out_8(&psc->op1, 0x1);
- }
- else {
- /* Negate RTS (become HIGH) */
- out_8(&psc->op0, 0x1);
- }
-}
-
-int serial_getcts_dev(unsigned int idx)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile psc512x_t *psc = (psc512x_t *) &im->psc[idx];
-
- return (in_8(&psc->ip) & 0x1) ? 0 : 1;
-}
-#endif /* CONFIG_PSC_CONSOLE */
-
-#define DECLARE_PSC_SERIAL_FUNCTIONS(port) \
- int serial##port##_init(void) \
- { \
- return serial_init_dev(port); \
- } \
- int serial##port##_uninit(void) \
- { \
- return serial_uninit_dev(port); \
- } \
- void serial##port##_setbrg(void) \
- { \
- serial_setbrg_dev(port); \
- } \
- int serial##port##_getc(void) \
- { \
- return serial_getc_dev(port); \
- } \
- int serial##port##_tstc(void) \
- { \
- return serial_tstc_dev(port); \
- } \
- void serial##port##_putc(const char c) \
- { \
- serial_putc_dev(port, c); \
- } \
- void serial##port##_puts(const char *s) \
- { \
- serial_puts_dev(port, s); \
- }
-
-#define INIT_PSC_SERIAL_STRUCTURE(port, __name) { \
- .name = __name, \
- .start = serial##port##_init, \
- .stop = serial##port##_uninit, \
- .setbrg = serial##port##_setbrg, \
- .getc = serial##port##_getc, \
- .tstc = serial##port##_tstc, \
- .putc = serial##port##_putc, \
- .puts = serial##port##_puts, \
-}
-
-#if defined(CONFIG_SYS_PSC1)
-DECLARE_PSC_SERIAL_FUNCTIONS(1);
-struct serial_device serial1_device =
-INIT_PSC_SERIAL_STRUCTURE(1, "psc1");
-#endif
-
-#if defined(CONFIG_SYS_PSC3)
-DECLARE_PSC_SERIAL_FUNCTIONS(3);
-struct serial_device serial3_device =
-INIT_PSC_SERIAL_STRUCTURE(3, "psc3");
-#endif
-
-#if defined(CONFIG_SYS_PSC4)
-DECLARE_PSC_SERIAL_FUNCTIONS(4);
-struct serial_device serial4_device =
-INIT_PSC_SERIAL_STRUCTURE(4, "psc4");
-#endif
-
-#if defined(CONFIG_SYS_PSC6)
-DECLARE_PSC_SERIAL_FUNCTIONS(6);
-struct serial_device serial6_device =
-INIT_PSC_SERIAL_STRUCTURE(6, "psc6");
-#endif
-
-__weak struct serial_device *default_serial_console(void)
-{
-#if (CONFIG_PSC_CONSOLE == 3)
- return &serial3_device;
-#elif (CONFIG_PSC_CONSOLE == 6)
- return &serial6_device;
-#else
-#error "invalid CONFIG_PSC_CONSOLE"
-#endif
-}
-
-void mpc512x_serial_initialize(void)
-{
-#if defined(CONFIG_SYS_PSC1)
- serial_register(&serial1_device);
-#endif
-#if defined(CONFIG_SYS_PSC3)
- serial_register(&serial3_device);
-#endif
-#if defined(CONFIG_SYS_PSC4)
- serial_register(&serial4_device);
-#endif
-#if defined(CONFIG_SYS_PSC6)
- serial_register(&serial6_device);
-#endif
-}
-
-#include <stdio_dev.h>
-/*
- * Routines for communication with serial devices over PSC
- */
-/* Bitfield for initialized PSCs */
-static unsigned int initialized;
-
-struct stdio_dev *open_port(int num, int baudrate)
-{
- struct stdio_dev *port;
- char env_var[16];
- char env_val[10];
- char name[7];
-
- if (num < 0 || num > 11)
- return NULL;
-
- sprintf(name, "psc%d", num);
- port = stdio_get_by_name(name);
- if (!port)
- return NULL;
-
- if (!test_bit(num, &initialized)) {
- sprintf(env_var, "psc%d_baudrate", num);
- sprintf(env_val, "%d", baudrate);
- setenv(env_var, env_val);
-
- if (port->start(port))
- return NULL;
-
- set_bit(num, &initialized);
- }
-
- return port;
-}
-
-int close_port(int num)
-{
- struct stdio_dev *port;
- int ret;
- char name[7];
-
- if (num < 0 || num > 11)
- return -1;
-
- sprintf(name, "psc%d", num);
- port = stdio_get_by_name(name);
- if (!port)
- return -1;
-
- ret = port->stop(port);
- clear_bit(num, &initialized);
-
- return ret;
-}
-
-int write_port(struct stdio_dev *port, char *buf)
-{
- if (!port || !buf)
- return -1;
-
- port->puts(port, buf);
-
- return 0;
-}
-
-int read_port(struct stdio_dev *port, char *buf, int size)
-{
- int cnt = 0;
-
- if (!port || !buf)
- return -1;
-
- if (!size)
- return 0;
-
- while (port->tstc(port)) {
- buf[cnt++] = port->getc(port);
- if (cnt > size)
- break;
- }
-
- return cnt;
-}
generated by cgit v0.10.2 at 2024-07-12 02:48:05 (GMT)