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path: root/src/soc/qualcomm/ipq806x/uart.c
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Diffstat (limited to 'src/soc/qualcomm/ipq806x/uart.c')
-rw-r--r--src/soc/qualcomm/ipq806x/uart.c233
1 files changed, 141 insertions, 92 deletions
diff --git a/src/soc/qualcomm/ipq806x/uart.c b/src/soc/qualcomm/ipq806x/uart.c
index c65f876821..f7b5d0295e 100644
--- a/src/soc/qualcomm/ipq806x/uart.c
+++ b/src/soc/qualcomm/ipq806x/uart.c
@@ -31,16 +31,56 @@
* SUCH DAMAGE.
*/
-
-#include <common.h>
-#include <asm/arch-ipq806x/gsbi.h>
-#include <asm/arch-ipq806x/clock.h>
-#include <asm/arch-ipq806x/uart.h>
-#include <serial.h>
+#include <arch/io.h>
+#include <boot/coreboot_tables.h>
+#include <console/console.h>
+#include <delay.h>
+#include <clock.h>
+#include <gpio.h>
+#include <gsbi.h>
+#include <console/uart.h>
+#include <ipq_uart.h>
+#include <stdint.h>
+#include <stdlib.h>
#define FIFO_DATA_SIZE 4
-extern board_ipq806x_params_t *gboard_param;
+typedef struct {
+ unsigned uart_dm_base;
+ unsigned uart_gsbi_base;
+ unsigned uart_gsbi;
+ uart_clk_mnd_t mnd_value;
+ gpio_func_data_t dbg_uart_gpio[NO_OF_DBG_UART_GPIOS];
+} uart_params_t;
+
+/*
+ * All constants lifted from u-boot's
+ * board/qcom/ipq806x_cdp/ipq806x_board_param.h
+ */
+static const uart_params_t uart_board_param = {
+ .uart_dm_base = UART4_DM_BASE,
+ .uart_gsbi_base = UART_GSBI4_BASE,
+ .uart_gsbi = GSBI_4,
+ .mnd_value = { 12, 625, 313 },
+ .dbg_uart_gpio = {
+ {
+ .gpio = 10,
+ .func = 1,
+ .dir = GPIO_OUTPUT,
+ .pull = GPIO_NO_PULL,
+ .drvstr = GPIO_12MA,
+ .enable = GPIO_DISABLE
+ },
+ {
+ .gpio = 11,
+ .func = 1,
+ .dir = GPIO_INPUT,
+ .pull = GPIO_NO_PULL,
+ .drvstr = GPIO_12MA,
+ .enable = GPIO_DISABLE
+ },
+ }
+};
static unsigned int msm_boot_uart_dm_init(unsigned int uart_dm_base);
@@ -57,21 +97,21 @@ static unsigned int word = 0;
static unsigned int msm_boot_uart_dm_init_rx_transfer(unsigned int uart_dm_base)
{
/* Reset receiver */
- writel(MSM_BOOT_UART_DM_CMD_RESET_RX,
+ writel_i(MSM_BOOT_UART_DM_CMD_RESET_RX,
MSM_BOOT_UART_DM_CR(uart_dm_base));
/* Enable receiver */
- writel(MSM_BOOT_UART_DM_CR_RX_ENABLE,
+ writel_i(MSM_BOOT_UART_DM_CR_RX_ENABLE,
MSM_BOOT_UART_DM_CR(uart_dm_base));
- writel(MSM_BOOT_UART_DM_DMRX_DEF_VALUE,
+ writel_i(MSM_BOOT_UART_DM_DMRX_DEF_VALUE,
MSM_BOOT_UART_DM_DMRX(uart_dm_base));
/* Clear stale event */
- writel(MSM_BOOT_UART_DM_CMD_RES_STALE_INT,
+ writel_i(MSM_BOOT_UART_DM_CMD_RES_STALE_INT,
MSM_BOOT_UART_DM_CR(uart_dm_base));
/* Enable stale event */
- writel(MSM_BOOT_UART_DM_GCMD_ENA_STALE_EVT,
+ writel_i(MSM_BOOT_UART_DM_GCMD_ENA_STALE_EVT,
MSM_BOOT_UART_DM_CR(uart_dm_base));
return MSM_BOOT_UART_DM_E_SUCCESS;
@@ -86,6 +126,7 @@ static unsigned int msm_boot_uart_dm_init_rx_transfer(unsigned int uart_dm_base)
* Reads a word from the RX FIFO. If no data is available blocks if
* @wait is true, else returns %MSM_BOOT_UART_DM_E_RX_NOT_READY.
*/
+ #if 0 /* Not used yet */
static unsigned int
msm_boot_uart_dm_read(unsigned int *data, int *count, int wait)
{
@@ -94,24 +135,24 @@ msm_boot_uart_dm_read(unsigned int *data, int *count, int wait)
unsigned int base = 0;
uint32_t status_reg;
- base = gboard_param->uart_dm_base;
+ base = uart_board_param.uart_dm_base;
if (data == NULL)
return MSM_BOOT_UART_DM_E_INVAL;
- status_reg = readl(MSM_BOOT_UART_DM_MISR(base));
+ status_reg = readl_i(MSM_BOOT_UART_DM_MISR(base));
/* Check for DM_RXSTALE for RX transfer to finish */
while (!(status_reg & MSM_BOOT_UART_DM_RXSTALE)) {
- status_reg = readl(MSM_BOOT_UART_DM_MISR(base));
+ status_reg = readl_i(MSM_BOOT_UART_DM_MISR(base));
if (!wait)
return MSM_BOOT_UART_DM_E_RX_NOT_READY;
}
/* Check for Overrun error. We'll just reset Error Status */
- if (readl(MSM_BOOT_UART_DM_SR(base)) &
+ if (readl_i(MSM_BOOT_UART_DM_SR(base)) &
MSM_BOOT_UART_DM_SR_UART_OVERRUN) {
- writel(MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT,
+ writel_i(MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT,
MSM_BOOT_UART_DM_CR(base));
total_rx_data = rx_data_read = 0;
msm_boot_uart_dm_init(base);
@@ -120,10 +161,10 @@ msm_boot_uart_dm_read(unsigned int *data, int *count, int wait)
/* Read UART_DM_RX_TOTAL_SNAP for actual number of bytes received */
if (total_rx_data == 0)
- total_rx_data = readl(MSM_BOOT_UART_DM_RX_TOTAL_SNAP(base));
+ total_rx_data = readl_i(MSM_BOOT_UART_DM_RX_TOTAL_SNAP(base));
/* Data available in FIFO; read a word. */
- *data = readl(MSM_BOOT_UART_DM_RF(base, 0));
+ *data = readl_i(MSM_BOOT_UART_DM_RF(base, 0));
/* WAR for http://prism/CR/548280 */
if (*data == 0) {
@@ -149,6 +190,7 @@ msm_boot_uart_dm_read(unsigned int *data, int *count, int wait)
return MSM_BOOT_UART_DM_E_SUCCESS;
}
+#endif
/**
* msm_boot_uart_replace_lr_with_cr - replaces "\n" with "\r\n"
@@ -160,7 +202,7 @@ msm_boot_uart_dm_read(unsigned int *data, int *count, int wait)
* "\r\n". Currently keeping it simple than efficient.
*/
static unsigned int
-msm_boot_uart_replace_lr_with_cr(char *data_in,
+msm_boot_uart_replace_lr_with_cr(unsigned char *data_in,
int num_of_chars,
char *data_out, int *num_of_chars_out)
{
@@ -190,7 +232,7 @@ msm_boot_uart_replace_lr_with_cr(char *data_in,
* till space becomes available.
*/
static unsigned int
-msm_boot_uart_dm_write(char *data, unsigned int num_of_chars)
+msm_boot_uart_dm_write(unsigned char *data, unsigned int num_of_chars)
{
unsigned int tx_word_count = 0;
unsigned int tx_char_left = 0, tx_char = 0;
@@ -198,7 +240,7 @@ msm_boot_uart_dm_write(char *data, unsigned int num_of_chars)
int i = 0;
char *tx_data = NULL;
char new_data[1024];
- unsigned int base = gboard_param->uart_dm_base;
+ unsigned int base = uart_board_param.uart_dm_base;
if ((data == NULL) || (num_of_chars <= 0))
return MSM_BOOT_UART_DM_E_INVAL;
@@ -216,17 +258,19 @@ msm_boot_uart_dm_write(char *data, unsigned int num_of_chars)
/* Check if transmit FIFO is empty.
* If not we'll wait for TX_READY interrupt. */
- if (!(readl(MSM_BOOT_UART_DM_SR(base)) & MSM_BOOT_UART_DM_SR_TXEMT)) {
- while (!(readl(MSM_BOOT_UART_DM_ISR(base)) & MSM_BOOT_UART_DM_TX_READY))
- __udelay(1);
+ if (!(readl_i(MSM_BOOT_UART_DM_SR(base)) & MSM_BOOT_UART_DM_SR_TXEMT)) {
+ while (!(readl_i(MSM_BOOT_UART_DM_ISR(base)) &
+ MSM_BOOT_UART_DM_TX_READY))
+ udelay(1);
}
/* We are here. FIFO is ready to be written. */
/* Write number of characters to be written */
- writel(num_of_chars, MSM_BOOT_UART_DM_NO_CHARS_FOR_TX(base));
+ writel_i(num_of_chars, MSM_BOOT_UART_DM_NO_CHARS_FOR_TX(base));
/* Clear TX_READY interrupt */
- writel(MSM_BOOT_UART_DM_GCMD_RES_TX_RDY_INT, MSM_BOOT_UART_DM_CR(base));
+ writel_i(MSM_BOOT_UART_DM_GCMD_RES_TX_RDY_INT,
+ MSM_BOOT_UART_DM_CR(base));
/* We use four-character word FIFO. So we need to divide data into
* four characters and write in UART_DM_TF register */
@@ -239,11 +283,12 @@ msm_boot_uart_dm_write(char *data, unsigned int num_of_chars)
PACK_CHARS_INTO_WORDS(tx_data, tx_char, tx_word);
/* Wait till TX FIFO has space */
- while (!(readl(MSM_BOOT_UART_DM_SR(base)) & MSM_BOOT_UART_DM_SR_TXRDY))
- __udelay(1);
+ while (!(readl_i(MSM_BOOT_UART_DM_SR(base)) &
+ MSM_BOOT_UART_DM_SR_TXRDY))
+ udelay(1);
/* TX FIFO has space. Write the chars */
- writel(tx_word, MSM_BOOT_UART_DM_TF(base, 0));
+ writel_i(tx_word, MSM_BOOT_UART_DM_TF(base, 0));
tx_char_left = num_of_chars - (i + 1) * 4;
tx_data = tx_data + 4;
}
@@ -257,11 +302,12 @@ msm_boot_uart_dm_write(char *data, unsigned int num_of_chars)
*/
static unsigned int msm_boot_uart_dm_reset(unsigned int base)
{
- writel(MSM_BOOT_UART_DM_CMD_RESET_RX, MSM_BOOT_UART_DM_CR(base));
- writel(MSM_BOOT_UART_DM_CMD_RESET_TX, MSM_BOOT_UART_DM_CR(base));
- writel(MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT, MSM_BOOT_UART_DM_CR(base));
- writel(MSM_BOOT_UART_DM_CMD_RES_TX_ERR, MSM_BOOT_UART_DM_CR(base));
- writel(MSM_BOOT_UART_DM_CMD_RES_STALE_INT, MSM_BOOT_UART_DM_CR(base));
+ writel_i(MSM_BOOT_UART_DM_CMD_RESET_RX, MSM_BOOT_UART_DM_CR(base));
+ writel_i(MSM_BOOT_UART_DM_CMD_RESET_TX, MSM_BOOT_UART_DM_CR(base));
+ writel_i(MSM_BOOT_UART_DM_CMD_RESET_ERR_STAT,
+ MSM_BOOT_UART_DM_CR(base));
+ writel_i(MSM_BOOT_UART_DM_CMD_RES_TX_ERR, MSM_BOOT_UART_DM_CR(base));
+ writel_i(MSM_BOOT_UART_DM_CMD_RES_STALE_INT, MSM_BOOT_UART_DM_CR(base));
return MSM_BOOT_UART_DM_E_SUCCESS;
}
@@ -274,36 +320,40 @@ static unsigned int msm_boot_uart_dm_init(unsigned int uart_dm_base)
{
/* Configure UART mode registers MR1 and MR2 */
/* Hardware flow control isn't supported */
- writel(0x0, MSM_BOOT_UART_DM_MR1(uart_dm_base));
+ writel_i(0x0, MSM_BOOT_UART_DM_MR1(uart_dm_base));
/* 8-N-1 configuration: 8 data bits - No parity - 1 stop bit */
- writel(MSM_BOOT_UART_DM_8_N_1_MODE, MSM_BOOT_UART_DM_MR2(uart_dm_base));
+ writel_i(MSM_BOOT_UART_DM_8_N_1_MODE,
+ MSM_BOOT_UART_DM_MR2(uart_dm_base));
/* Configure Interrupt Mask register IMR */
- writel(MSM_BOOT_UART_DM_IMR_ENABLED, MSM_BOOT_UART_DM_IMR(uart_dm_base));
+ writel_i(MSM_BOOT_UART_DM_IMR_ENABLED,
+ MSM_BOOT_UART_DM_IMR(uart_dm_base));
/*
* Configure Tx and Rx watermarks configuration registers
* TX watermark value is set to 0 - interrupt is generated when
* FIFO level is less than or equal to 0
*/
- writel(MSM_BOOT_UART_DM_TFW_VALUE, MSM_BOOT_UART_DM_TFWR(uart_dm_base));
+ writel_i(MSM_BOOT_UART_DM_TFW_VALUE,
+ MSM_BOOT_UART_DM_TFWR(uart_dm_base));
/* RX watermark value */
- writel(MSM_BOOT_UART_DM_RFW_VALUE, MSM_BOOT_UART_DM_RFWR(uart_dm_base));
+ writel_i(MSM_BOOT_UART_DM_RFW_VALUE,
+ MSM_BOOT_UART_DM_RFWR(uart_dm_base));
/* Configure Interrupt Programming Register */
/* Set initial Stale timeout value */
- writel(MSM_BOOT_UART_DM_STALE_TIMEOUT_LSB,
+ writel_i(MSM_BOOT_UART_DM_STALE_TIMEOUT_LSB,
MSM_BOOT_UART_DM_IPR(uart_dm_base));
/* Configure IRDA if required */
/* Disabling IRDA mode */
- writel(0x0, MSM_BOOT_UART_DM_IRDA(uart_dm_base));
+ writel_i(0x0, MSM_BOOT_UART_DM_IRDA(uart_dm_base));
/* Configure hunt character value in HCR register */
/* Keep it in reset state */
- writel(0x0, MSM_BOOT_UART_DM_HCR(uart_dm_base));
+ writel_i(0x0, MSM_BOOT_UART_DM_HCR(uart_dm_base));
/*
* Configure Rx FIFO base address
@@ -318,10 +368,10 @@ static unsigned int msm_boot_uart_dm_init(unsigned int uart_dm_base)
/* Enable/Disable Rx/Tx DM interfaces */
/* Data Mover not currently utilized. */
- writel(0x0, MSM_BOOT_UART_DM_DMEN(uart_dm_base));
+ writel_i(0x0, MSM_BOOT_UART_DM_DMEN(uart_dm_base));
/* Enable transmitter */
- writel(MSM_BOOT_UART_DM_CR_TX_ENABLE,
+ writel_i(MSM_BOOT_UART_DM_CR_TX_ENABLE,
MSM_BOOT_UART_DM_CR(uart_dm_base));
/* Initialize Receive Path */
@@ -331,110 +381,109 @@ static unsigned int msm_boot_uart_dm_init(unsigned int uart_dm_base)
}
/**
- * uart_dm_init - initializes UART
+ * uart_init - initializes UART
*
* Initializes clocks, GPIO and UART controller.
*/
-static int uart_dm_init(void)
+void uart_init(int idx)
{
+ /* Note int idx isn't used in this driver. */
unsigned int dm_base, gsbi_base;
- dm_base = gboard_param->uart_dm_base;
- gsbi_base = gboard_param->uart_gsbi_base;
- ipq_configure_gpio(gboard_param->dbg_uart_gpio, NO_OF_DBG_UART_GPIOS);
+ dm_base = uart_board_param.uart_dm_base;
+ gsbi_base = uart_board_param.uart_gsbi_base;
+ ipq_configure_gpio(uart_board_param.dbg_uart_gpio,
+ NO_OF_DBG_UART_GPIOS);
/* Configure the uart clock */
- uart_clock_config(gboard_param->uart_gsbi,
- gboard_param->mnd_value.m_value,
- gboard_param->mnd_value.n_value,
- gboard_param->mnd_value.d_value,
- gboard_param->clk_dummy);
+ uart_clock_config(uart_board_param.uart_gsbi,
+ uart_board_param.mnd_value.m_value,
+ uart_board_param.mnd_value.n_value,
+ uart_board_param.mnd_value.d_value,
+ 0);
- writel(GSBI_PROTOCOL_CODE_I2C_UART <<
+ writel_i(GSBI_PROTOCOL_CODE_I2C_UART <<
GSBI_CTRL_REG_PROTOCOL_CODE_S,
GSBI_CTRL_REG(gsbi_base));
- writel(UART_DM_CLK_RX_TX_BIT_RATE, MSM_BOOT_UART_DM_CSR(dm_base));
+ writel_i(UART_DM_CLK_RX_TX_BIT_RATE, MSM_BOOT_UART_DM_CSR(dm_base));
+
/* Intialize UART_DM */
msm_boot_uart_dm_init(dm_base);
+}
- return 0;
+#if 0 /* Not used yet */
+uint32_t uartmem_getbaseaddr(void)
+{
+ return uart_board_param.uart_dm_base;
}
+#endif
/**
- * ipq806x_serial_putc - transmits a character
+ * uart_tx_byte - transmits a character
* @c: character to transmit
*/
-static void ipq806x_serial_putc(char c)
+void uart_tx_byte(int idx, unsigned char c)
{
msm_boot_uart_dm_write(&c, 1);
}
/**
- * ipq806x_serial_puts - transmits a string of data
+ * uart_tx_flush - transmits a string of data
* @s: string to transmit
*/
-static void ipq806x_serial_puts(const char *s)
+void uart_tx_flush(int idx)
{
- while (*s != '\0')
- serial_putc(*s++);
+ unsigned int base = uart_board_param.uart_dm_base;
+
+ while (!(readl_i(MSM_BOOT_UART_DM_SR(base)) &
+ MSM_BOOT_UART_DM_SR_TXEMT))
+ ;
}
/**
- * ipq806x_serial_tstc - checks if data available for reading
+ * uart_can_rx_byte - checks if data available for reading
*
* Returns 1 if data available, 0 otherwise
*/
-static int ipq806x_serial_tstc(void)
+ #if 0 /* Not used yet */
+int uart_can_rx_byte(void)
{
/* Return if data is already read */
if (valid_data)
return 1;
/* Read data from the FIFO */
- if (msm_boot_uart_dm_read(&word, &valid_data, 0) != MSM_BOOT_UART_DM_E_SUCCESS)
+ if (msm_boot_uart_dm_read(&word, &valid_data, 0) !=
+ MSM_BOOT_UART_DM_E_SUCCESS)
return 0;
return 1;
}
+#endif
/**
* ipq806x_serial_getc - reads a character
*
* Returns the character read from serial port.
*/
-static int ipq806x_serial_getc(void)
+uint8_t uart_rx_byte(int idx)
{
- int byte;
+ uint8_t byte;
- while (!serial_tstc()) {
+#if 0 /* Not used yet */
+ while (!uart_can_rx_byte()) {
/* wait for incoming data */
}
-
- byte = (int)word & 0xff;
+#endif
+ byte = (uint8_t)(word & 0xff);
word = word >> 8;
valid_data--;
return byte;
}
-
-static struct serial_device ipq_serial_device = {
- .name = "ipq_serial",
- .start = uart_dm_init,
- .getc = ipq806x_serial_getc,
- .tstc = ipq806x_serial_tstc,
- .putc = ipq806x_serial_putc,
- .puts = ipq806x_serial_puts,
-};
-
-__weak struct serial_device *default_serial_console(void)
-{
- return &ipq_serial_device;
-}
-
-/**
- * ipq806x_serial_init - initializes serial controller
- */
-void ipq806x_serial_initialize(void)
+#ifndef __PRE_RAM__
+/* TODO: Implement fuction */
+void uart_fill_lb(void *data)
{
- serial_register(&ipq_serial_device);
}
+#endif
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