*
* based on drivers/serial/s3c64xx.c
*
- * 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
- *
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <fdtdec.h>
+#include <linux/compiler.h>
#include <asm/io.h>
#include <asm/arch/uart.h>
#include <asm/arch/clk.h>
#include <serial.h>
+DECLARE_GLOBAL_DATA_PTR;
+
+#define RX_FIFO_COUNT_MASK 0xff
+#define RX_FIFO_FULL_MASK (1 << 8)
+#define TX_FIFO_FULL_MASK (1 << 24)
+
+/* Information about a serial port */
+struct fdt_serial {
+ u32 base_addr; /* address of registers in physical memory */
+ u8 port_id; /* uart port number */
+ u8 enabled; /* 1 if enabled, 0 if disabled */
+} config __attribute__ ((section(".data")));
+
static inline struct s5p_uart *s5p_get_base_uart(int dev_index)
{
+#ifdef CONFIG_OF_CONTROL
+ return (struct s5p_uart *)(config.base_addr);
+#else
u32 offset = dev_index * sizeof(struct s5p_uart);
-
- if (cpu_is_s5pc100())
- return (struct s5p_uart *)(S5PC100_UART_BASE + offset);
- else
- return (struct s5p_uart *)(S5PC110_UART_BASE + offset);
+ return (struct s5p_uart *)(samsung_get_base_uart() + offset);
+#endif
}
/*
0xffdf,
};
-void serial_setbrg_dev(const int dev_index)
+static void serial_setbrg_dev(const int dev_index)
{
- DECLARE_GLOBAL_DATA_PTR;
struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
- u32 pclk = get_pclk();
+ u32 uclk = get_uart_clk(dev_index);
u32 baudrate = gd->baudrate;
u32 val;
- val = pclk / baudrate;
+#if defined(CONFIG_SILENT_CONSOLE) && \
+ defined(CONFIG_OF_CONTROL) && \
+ !defined(CONFIG_SPL_BUILD)
+ if (fdtdec_get_config_int(gd->fdt_blob, "silent_console", 0))
+ gd->flags |= GD_FLG_SILENT;
+#endif
+
+ if (!config.enabled)
+ return;
+
+ val = uclk / baudrate;
writel(val / 16 - 1, &uart->ubrdiv);
- writew(udivslot[val % 16], &uart->udivslot);
+
+ if (s5p_uart_divslot())
+ writew(udivslot[val % 16], &uart->rest.slot);
+ else
+ writeb(val % 16, &uart->rest.value);
}
/*
* Initialise the serial port with the given baudrate. The settings
* are always 8 data bits, no parity, 1 stop bit, no start bits.
*/
-int serial_init_dev(const int dev_index)
+static int serial_init_dev(const int dev_index)
{
struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
- /* reset and enable FIFOs, set triggers to the maximum */
- writel(0, &uart->ufcon);
+ /* enable FIFOs, auto clear Rx FIFO */
+ writel(0x3, &uart->ufcon);
writel(0, &uart->umcon);
/* 8N1 */
writel(0x3, &uart->ulcon);
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
-int serial_getc_dev(const int dev_index)
+static int serial_getc_dev(const int dev_index)
{
struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
+ if (!config.enabled)
+ return 0;
+
/* wait for character to arrive */
- while (!(readl(&uart->utrstat) & 0x1)) {
+ while (!(readl(&uart->ufstat) & (RX_FIFO_COUNT_MASK |
+ RX_FIFO_FULL_MASK))) {
if (serial_err_check(dev_index, 0))
return 0;
}
- return (int)(readl(&uart->urxh) & 0xff);
+ return (int)(readb(&uart->urxh) & 0xff);
}
/*
* Output a single byte to the serial port.
*/
-void serial_putc_dev(const char c, const int dev_index)
+static void serial_putc_dev(const char c, const int dev_index)
{
struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
+ if (!config.enabled)
+ return;
+
/* wait for room in the tx FIFO */
- while (!(readl(&uart->utrstat) & 0x2)) {
+ while ((readl(&uart->ufstat) & TX_FIFO_FULL_MASK)) {
if (serial_err_check(dev_index, 1))
return;
}
- writel(c, &uart->utxh);
+ writeb(c, &uart->utxh);
/* If \n, also do \r */
if (c == '\n')
/*
* Test whether a character is in the RX buffer
*/
-int serial_tstc_dev(const int dev_index)
+static int serial_tstc_dev(const int dev_index)
{
struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
+ if (!config.enabled)
+ return 0;
+
return (int)(readl(&uart->utrstat) & 0x1);
}
-void serial_puts_dev(const char *s, const int dev_index)
+static void serial_puts_dev(const char *s, const int dev_index)
{
while (*s)
serial_putc_dev(*s++, dev_index);
/* Multi serial device functions */
#define DECLARE_S5P_SERIAL_FUNCTIONS(port) \
-int s5p_serial##port##_init(void) { return serial_init_dev(port); } \
-void s5p_serial##port##_setbrg(void) { serial_setbrg_dev(port); } \
-int s5p_serial##port##_getc(void) { return serial_getc_dev(port); } \
-int s5p_serial##port##_tstc(void) { return serial_tstc_dev(port); } \
-void s5p_serial##port##_putc(const char c) { serial_putc_dev(c, port); } \
-void s5p_serial##port##_puts(const char *s) { serial_puts_dev(s, port); }
-
-#define INIT_S5P_SERIAL_STRUCTURE(port, name, bus) { \
- name, \
- bus, \
- s5p_serial##port##_init, \
- s5p_serial##port##_setbrg, \
- s5p_serial##port##_getc, \
- s5p_serial##port##_tstc, \
- s5p_serial##port##_putc, \
- s5p_serial##port##_puts, }
+static int s5p_serial##port##_init(void) { return serial_init_dev(port); } \
+static void s5p_serial##port##_setbrg(void) { serial_setbrg_dev(port); } \
+static int s5p_serial##port##_getc(void) { return serial_getc_dev(port); } \
+static int s5p_serial##port##_tstc(void) { return serial_tstc_dev(port); } \
+static void s5p_serial##port##_putc(const char c) { serial_putc_dev(c, port); } \
+static void s5p_serial##port##_puts(const char *s) { serial_puts_dev(s, port); }
+
+#define INIT_S5P_SERIAL_STRUCTURE(port, __name) { \
+ .name = __name, \
+ .start = s5p_serial##port##_init, \
+ .stop = NULL, \
+ .setbrg = s5p_serial##port##_setbrg, \
+ .getc = s5p_serial##port##_getc, \
+ .tstc = s5p_serial##port##_tstc, \
+ .putc = s5p_serial##port##_putc, \
+ .puts = s5p_serial##port##_puts, \
+}
DECLARE_S5P_SERIAL_FUNCTIONS(0);
struct serial_device s5p_serial0_device =
- INIT_S5P_SERIAL_STRUCTURE(0, "s5pser0", "S5PUART0");
+ INIT_S5P_SERIAL_STRUCTURE(0, "s5pser0");
DECLARE_S5P_SERIAL_FUNCTIONS(1);
struct serial_device s5p_serial1_device =
- INIT_S5P_SERIAL_STRUCTURE(1, "s5pser1", "S5PUART1");
+ INIT_S5P_SERIAL_STRUCTURE(1, "s5pser1");
DECLARE_S5P_SERIAL_FUNCTIONS(2);
struct serial_device s5p_serial2_device =
- INIT_S5P_SERIAL_STRUCTURE(2, "s5pser2", "S5PUART2");
+ INIT_S5P_SERIAL_STRUCTURE(2, "s5pser2");
DECLARE_S5P_SERIAL_FUNCTIONS(3);
struct serial_device s5p_serial3_device =
- INIT_S5P_SERIAL_STRUCTURE(3, "s5pser3", "S5PUART3");
+ INIT_S5P_SERIAL_STRUCTURE(3, "s5pser3");
+
+#ifdef CONFIG_OF_CONTROL
+int fdtdec_decode_console(int *index, struct fdt_serial *uart)
+{
+ const void *blob = gd->fdt_blob;
+ int node;
+
+ node = fdt_path_offset(blob, "console");
+ if (node < 0)
+ return node;
+
+ uart->base_addr = fdtdec_get_addr(blob, node, "reg");
+ if (uart->base_addr == FDT_ADDR_T_NONE)
+ return -FDT_ERR_NOTFOUND;
+
+ uart->port_id = fdtdec_get_int(blob, node, "id", -1);
+ uart->enabled = fdtdec_get_is_enabled(blob, node);
+
+ return 0;
+}
+#endif
+
+__weak struct serial_device *default_serial_console(void)
+{
+#ifdef CONFIG_OF_CONTROL
+ int index = 0;
+
+ if ((!config.base_addr) && (fdtdec_decode_console(&index, &config))) {
+ debug("Cannot decode default console node\n");
+ return NULL;
+ }
+
+ switch (config.port_id) {
+ case 0:
+ return &s5p_serial0_device;
+ case 1:
+ return &s5p_serial1_device;
+ case 2:
+ return &s5p_serial2_device;
+ case 3:
+ return &s5p_serial3_device;
+ default:
+ debug("Unknown config.port_id: %d", config.port_id);
+ break;
+ }
+
+ return NULL;
+#else
+ config.enabled = 1;
+#if defined(CONFIG_SERIAL0)
+ return &s5p_serial0_device;
+#elif defined(CONFIG_SERIAL1)
+ return &s5p_serial1_device;
+#elif defined(CONFIG_SERIAL2)
+ return &s5p_serial2_device;
+#elif defined(CONFIG_SERIAL3)
+ return &s5p_serial3_device;
+#else
+#error "CONFIG_SERIAL? missing."
+#endif
+#endif
+}
+
+void s5p_serial_initialize(void)
+{
+ serial_register(&s5p_serial0_device);
+ serial_register(&s5p_serial1_device);
+ serial_register(&s5p_serial2_device);
+ serial_register(&s5p_serial3_device);
+}
projects / karo-tx-uboot.git / blobdiff