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-rw-r--r--src/cpu/samsung/exynos5-common/spi.c236
-rw-r--r--src/cpu/samsung/exynos5-common/spi.h13
-rw-r--r--src/mainboard/google/snow/bootblock.c251
3 files changed, 251 insertions, 249 deletions
diff --git a/src/cpu/samsung/exynos5-common/spi.c b/src/cpu/samsung/exynos5-common/spi.c
index e13eadf3fe..90b74c018f 100644
--- a/src/cpu/samsung/exynos5-common/spi.c
+++ b/src/cpu/samsung/exynos5-common/spi.c
@@ -1,7 +1,237 @@
-#include <cbfs.h>
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ * Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
-/* TODO provide a real SPI driver here for firmware media. */
+#include <stdlib.h>
+
+#include <common.h>
+#include <console/console.h>
+
+#include <cpu/samsung/exynos5250/gpio.h>
+#include <cpu/samsung/exynos5250/clk.h>
+
+#include "spi.h"
+
+#define OM_STAT (0x1f << 1)
+#define EXYNOS_BASE_SPI1 ((void *)0x12d30000)
+
+#if defined(CONFIG_DEBUG_SPI) && CONFIG_DEBUG_SPI
+# define DEBUG_SPI(x,...) printk(BIOS_DEBUG, "EXYNOS_SPI: " x)
+#else
+# define DEBUG_SPI(x,...)
+#endif
+
+static void exynos_spi_rx_tx(struct exynos_spi *regs, int todo,
+ void *dinp, void const *doutp, int i)
+{
+ int rx_lvl, tx_lvl;
+ uint *rxp = (uint *)(dinp + (i * (32 * 1024)));
+ uint out_bytes, in_bytes;
+
+ // TODO In currrent implementation, every read/write must be aligned to
+ // 4 bytes, otherwise you may get timeout or other unexpected results.
+ assert(todo % 4 == 0);
+
+ out_bytes = in_bytes = todo;
+ setbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
+
+ while (in_bytes) {
+ uint32_t spi_sts;
+ int temp;
+
+ spi_sts = readl(&regs->spi_sts);
+ rx_lvl = ((spi_sts >> 15) & 0x7f);
+ tx_lvl = ((spi_sts >> 6) & 0x7f);
+ while (tx_lvl < 32 && out_bytes) {
+ // TODO The "writing" (tx) is not supported now; that's
+ // why we write garbage to keep driving FIFO clock.
+ temp = 0xffffffff;
+ writel(temp, &regs->tx_data);
+ out_bytes -= 4;
+ tx_lvl += 4;
+ }
+ while (rx_lvl >= 4 && in_bytes) {
+ temp = readl(&regs->rx_data);
+ if (rxp)
+ *rxp++ = temp;
+ in_bytes -= 4;
+ rx_lvl -= 4;
+ }
+ }
+}
+
+int exynos_spi_open(struct exynos_spi *regs)
+{
+ clock_set_rate(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
+ /* set the spi1 GPIO */
+
+ // TODO Some of these should be done in board's bootblock file.
+ // We should fix-up the mainboard-specific vs. exynos-specific parts in a
+ // follow-up CL.
+
+// exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
+ gpio_cfg_pin(GPIO_A24, 0x2);
+ gpio_cfg_pin(GPIO_A25, 0x2);
+ gpio_cfg_pin(GPIO_A26, 0x2);
+ gpio_cfg_pin(GPIO_A27, 0x2);
+
+ /* set pktcnt and enable it */
+ writel(4 | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
+ /* set FB_CLK_SEL */
+ writel(SPI_FB_DELAY_180, &regs->fb_clk);
+ /* set CH_WIDTH and BUS_WIDTH as word */
+ setbits_le32(&regs->mode_cfg,
+ SPI_MODE_CH_WIDTH_WORD | SPI_MODE_BUS_WIDTH_WORD);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
+
+ /* clear rx and tx channel if set priveously */
+ clrbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
+
+ setbits_le32(&regs->swap_cfg,
+ SPI_RX_SWAP_EN | SPI_RX_BYTE_SWAP | SPI_RX_HWORD_SWAP);
+
+ /* do a soft reset */
+ setbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+
+ /* now set rx and tx channel ON */
+ setbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
+ clrbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
+ return 0;
+}
+
+int exynos_spi_read(struct exynos_spi *regs, void *dest, u32 len, u32 off)
+{
+ int upto, todo;
+ int i;
+ /* Send read instruction (0x3h) followed by a 24 bit addr */
+ writel((SF_READ_DATA_CMD << 24) | off, &regs->tx_data);
+
+ /* waiting for TX done */
+ while (!(readl(&regs->spi_sts) & SPI_ST_TX_DONE));
+
+ for (upto = 0, i = 0; upto < len; upto += todo, i++) {
+ todo = MIN(len - upto, (1 << 15));
+ exynos_spi_rx_tx(regs, todo, dest, (void *)(off), i);
+ }
+
+ setbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
+
+ /*
+ * Let put controller mode to BYTE as
+ * SPI driver does not support WORD mode yet
+ */
+ clrbits_le32(&regs->mode_cfg,
+ SPI_MODE_CH_WIDTH_WORD | SPI_MODE_BUS_WIDTH_WORD);
+ writel(0, &regs->swap_cfg);
+
+ return len;
+}
+
+int exynos_spi_close(struct exynos_spi *regs)
+{
+ /*
+ * Flush spi tx, rx fifos and reset the SPI controller
+ * and clear rx/tx channel
+ */
+ clrsetbits_le32(&regs->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
+ return 0;
+}
+
+// SPI as CBFS media.
+struct exynos_spi_media {
+ struct exynos_spi *regs;
+ struct cbfs_simple_buffer buffer;
+};
+
+static int exynos_spi_cbfs_open(struct cbfs_media *media) {
+ struct exynos_spi_media *spi = (struct exynos_spi_media*)media->context;
+ DEBUG_SPI("exynos_spi_cbfs_open\n");
+ return exynos_spi_open(spi->regs);
+}
+
+static int exynos_spi_cbfs_close(struct cbfs_media *media) {
+ struct exynos_spi_media *spi = (struct exynos_spi_media*)media->context;
+ DEBUG_SPI("exynos_spi_cbfs_close\n");
+ return exynos_spi_close(spi->regs);
+}
+
+static size_t exynos_spi_cbfs_read(struct cbfs_media *media, void *dest,
+ size_t offset, size_t count) {
+ struct exynos_spi_media *spi = (struct exynos_spi_media*)media->context;
+ int bytes;
+ DEBUG_SPI("exynos_spi_cbfs_read(%u)\n", count);
+ bytes = exynos_spi_read(spi->regs, dest, count, offset);
+ // Flush and re-open the device.
+ exynos_spi_close(spi->regs);
+ exynos_spi_open(spi->regs);
+ return bytes;
+}
+
+static void *exynos_spi_cbfs_map(struct cbfs_media *media, size_t offset,
+ size_t count) {
+ struct exynos_spi_media *spi = (struct exynos_spi_media*)media->context;
+ DEBUG_SPI("exynos_spi_cbfs_map\n");
+ // See exynos_spi_rx_tx for I/O alignment limitation.
+ if (count % 4)
+ count += 4 - (count % 4);
+ return cbfs_simple_buffer_map(&spi->buffer, media, offset, count);
+}
+
+static void *exynos_spi_cbfs_unmap(struct cbfs_media *media,
+ const void *address) {
+ struct exynos_spi_media *spi = (struct exynos_spi_media*)media->context;
+ DEBUG_SPI("exynos_spi_cbfs_unmap\n");
+ return cbfs_simple_buffer_unmap(&spi->buffer, address);
+}
+
+int initialize_exynos_spi_cbfs_media(struct cbfs_media *media,
+ void *buffer_address,
+ size_t buffer_size) {
+ // TODO Replace static variable to support multiple streams.
+ static struct exynos_spi_media context;
+ DEBUG_SPI("initialize_exynos_spi_cbfs_media\n");
+
+ context.regs = EXYNOS_BASE_SPI1;
+ context.buffer.allocated = context.buffer.last_allocate = 0;
+ context.buffer.buffer = buffer_address;
+ context.buffer.size = buffer_size;
+ media->context = (void*)&context;
+ media->open = exynos_spi_cbfs_open;
+ media->close = exynos_spi_cbfs_close;
+ media->read = exynos_spi_cbfs_read;
+ media->map = exynos_spi_cbfs_map;
+ media->unmap = exynos_spi_cbfs_unmap;
+
+ return 0;
+}
int init_default_cbfs_media(struct cbfs_media *media) {
- return -1;
+ return initialize_exynos_spi_cbfs_media(
+ media,
+ (void*)CONFIG_CBFS_CACHE_ADDRESS,
+ CONFIG_CBFS_CACHE_SIZE);
}
diff --git a/src/cpu/samsung/exynos5-common/spi.h b/src/cpu/samsung/exynos5-common/spi.h
index 3f3675921c..e021888614 100644
--- a/src/cpu/samsung/exynos5-common/spi.h
+++ b/src/cpu/samsung/exynos5-common/spi.h
@@ -22,6 +22,9 @@
#ifndef __ASSEMBLER__
+// This driver serves as a CBFS media source.
+#include <cbfs.h>
+
/* SPI peripheral register map; padded to 64KB */
struct exynos_spi {
unsigned int ch_cfg; /* 0x00 */
@@ -85,5 +88,15 @@ struct exynos_spi {
#define SPI_RX_BYTE_SWAP (1 << 6)
#define SPI_RX_HWORD_SWAP (1 << 7)
+/* API */
+int exynos_spi_open(struct exynos_spi *regs);
+int exynos_spi_read(struct exynos_spi *regs, void *dest, u32 len, u32 off);
+int exynos_spi_close(struct exynos_spi *regs);
+
+/* Serve as CBFS Media */
+int initialize_exynos_spi_cbfs_media(struct cbfs_media *media,
+ void *buffer_address,
+ size_t buffer_size);
+
#endif /* __ASSEMBLER__ */
#endif
diff --git a/src/mainboard/google/snow/bootblock.c b/src/mainboard/google/snow/bootblock.c
index 5b3efa025c..3887e7e06d 100644
--- a/src/mainboard/google/snow/bootblock.c
+++ b/src/mainboard/google/snow/bootblock.c
@@ -17,11 +17,10 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#define uchar unsigned char
-#define uint unsigned int
-
#include <stdlib.h>
#include <types.h>
+#include <assert.h>
+#include <arch/armv7/include/common.h>
#include <arch/io.h>
#include "cpu/samsung/exynos5250/clk.h"
#include "cpu/samsung/exynos5250/cpu.h"
@@ -46,87 +45,6 @@
/* TODO Move to Makefile.inc once we support adding bootblock stage files. */
#include "cpu/samsung/exynos5-common/spi.c"
-/* FIXME(dhendrix): Can we move this SPI stuff elsewhere? */
-static void spi_rx_tx(struct exynos_spi *regs, int todo,
- void *dinp, void const *doutp, int i)
-{
- unsigned int *rxp = (unsigned int *)(dinp + (i * (32 * 1024)));
- int rx_lvl, tx_lvl;
- unsigned int out_bytes, in_bytes;
-
- out_bytes = in_bytes = todo;
- setbits_le32(&regs->ch_cfg, SPI_CH_RST);
- clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
- writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
-
- while (in_bytes) {
- uint32_t spi_sts;
- int temp;
-
- spi_sts = readl(&regs->spi_sts);
- rx_lvl = ((spi_sts >> 15) & 0x7f);
- tx_lvl = ((spi_sts >> 6) & 0x7f);
- while (tx_lvl < 32 && out_bytes) {
- temp = 0xffffffff;
- writel(temp, &regs->tx_data);
- out_bytes -= 4;
- tx_lvl += 4;
- }
- while (rx_lvl >= 4 && in_bytes) {
- temp = readl(&regs->rx_data);
- if (rxp)
- *rxp++ = temp;
- in_bytes -= 4;
- rx_lvl -= 4;
- }
- }
-}
-
-#if 0
-void clock_ll_set_pre_ratio(enum periph_id periph_id, unsigned divisor)
-{
- struct exynos5_clock *clk =
- (struct exynos5_clock *)samsung_get_base_clock();
- unsigned shift;
- unsigned mask = 0xff;
- u32 *reg;
-
- /*
- * For now we only handle a very small subset of peipherals here.
- * Others will need to (and do) mangle the clock registers
- * themselves, At some point it is hoped that this function can work
- * from a table or calculated register offset / mask. For now this
- * is at least better than spreading clock control code around
- * U-Boot.
- */
- switch (periph_id) {
- case PERIPH_ID_SPI0:
- reg = &clk->div_peric1;
- shift = 8;
- break;
- case PERIPH_ID_SPI1:
- reg = &clk->div_peric1;
- shift = 24;
- break;
- case PERIPH_ID_SPI2:
- reg = &clk->div_peric2;
- shift = 8;
- break;
- case PERIPH_ID_SPI3:
- reg = &clk->sclk_div_isp;
- shift = 4;
- break;
- case PERIPH_ID_SPI4:
- reg = &clk->sclk_div_isp;
- shift = 16;
- break;
- default:
- debug("%s: Unsupported peripheral ID %d\n", __func__,
- periph_id);
- return;
- }
-}
-#endif
void clock_ll_set_pre_ratio(enum periph_id periph_id, unsigned divisor)
{
struct exynos5_clock *clk =
@@ -140,43 +58,6 @@ void clock_ll_set_pre_ratio(enum periph_id periph_id, unsigned divisor)
clrsetbits_le32(reg, mask << shift, (divisor & mask) << shift);
}
-#if 0
-void clock_ll_set_ratio(enum periph_id periph_id, unsigned divisor)
-{
- struct exynos5_clock *clk =
- (struct exynos5_clock *)samsung_get_base_clock();
- unsigned shift;
- unsigned mask = 0xff;
- u32 *reg;
-
- switch (periph_id) {
- case PERIPH_ID_SPI0:
- reg = &clk->div_peric1;
- shift = 0;
- break;
- case PERIPH_ID_SPI1:
- reg = &clk->div_peric1;
- shift = 16;
- break;
- case PERIPH_ID_SPI2:
- reg = &clk->div_peric2;
- shift = 0;
- break;
- case PERIPH_ID_SPI3:
- reg = &clk->sclk_div_isp;
- shift = 0;
- break;
- case PERIPH_ID_SPI4:
- reg = &clk->sclk_div_isp;
- shift = 12;
- break;
- default:
- debug("%s: Unsupported peripheral ID %d\n", __func__,
- periph_id);
- return;
- }
-}
-#endif
void clock_ll_set_ratio(enum periph_id periph_id, unsigned divisor)
{
struct exynos5_clock *clk =
@@ -253,44 +134,6 @@ static int clock_calc_best_scalar(unsigned int main_scaler_bits,
return best_main_scalar;
}
-#if 0
-int clock_set_rate(enum periph_id periph_id, unsigned int rate)
-{
- int main;
- unsigned int fine;
-
- switch (periph_id) {
- case PERIPH_ID_SPI0:
- case PERIPH_ID_SPI1:
- case PERIPH_ID_SPI2:
- case PERIPH_ID_SPI3:
- case PERIPH_ID_SPI4:
- main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
- if (main < 0) {
- debug("%s: Cannot set clock rate for periph %d",
- __func__, periph_id);
- return -1;
- }
- clock_ll_set_ratio(periph_id, main - 1);
- clock_ll_set_pre_ratio(periph_id, fine - 1);
- break;
- default:
- debug("%s: Unsupported peripheral ID %d\n", __func__,
- periph_id);
- return -1;
- }
- main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
- if (main < 0) {
- debug("%s: Cannot set clock rate for periph %d",
- __func__, periph_id);
- return -1;
- }
- clock_ll_set_ratio(PERIPH_ID_SPI1, main - 1);
- clock_ll_set_pre_ratio(PERIPH_ID_SPI1, fine - 1);
-
- return 0;
-}
-#endif
int clock_set_rate(enum periph_id periph_id, unsigned int rate)
{
int main;
@@ -362,77 +205,6 @@ void gpio_cfg_pin(int gpio, int cfg)
writel(value, &bank->con);
}
-//static void exynos_spi_copy(unsigned int uboot_size)
-static void copy_romstage(uint32_t spi_addr, uint32_t sram_addr, unsigned int len)
-{
- int upto, todo;
- int i;
-// struct exynos_spi *regs = (struct exynos_spi *)samsung_get_base_spi1();
- struct exynos_spi *regs = (struct exynos_spi *)0x12d30000;
-
- clock_set_rate(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
- /* set the spi1 GPIO */
-// exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
- gpio_cfg_pin(GPIO_A24, 0x2);
- gpio_cfg_pin(GPIO_A25, 0x2);
- gpio_cfg_pin(GPIO_A26, 0x2);
- gpio_cfg_pin(GPIO_A27, 0x2);
-
- /* set pktcnt and enable it */
- writel(4 | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
- /* set FB_CLK_SEL */
- writel(SPI_FB_DELAY_180, &regs->fb_clk);
- /* set CH_WIDTH and BUS_WIDTH as word */
- setbits_le32(&regs->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
- SPI_MODE_BUS_WIDTH_WORD);
- clrbits_le32(&regs->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
-
- /* clear rx and tx channel if set priveously */
- clrbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
-
- setbits_le32(&regs->swap_cfg, SPI_RX_SWAP_EN |
- SPI_RX_BYTE_SWAP |
- SPI_RX_HWORD_SWAP);
-
- /* do a soft reset */
- setbits_le32(&regs->ch_cfg, SPI_CH_RST);
- clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
-
- /* now set rx and tx channel ON */
- setbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
- clrbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
-
- /* Send read instruction (0x3h) followed by a 24 bit addr */
- writel((SF_READ_DATA_CMD << 24) | spi_addr, &regs->tx_data);
-
- /* waiting for TX done */
- while (!(readl(&regs->spi_sts) & SPI_ST_TX_DONE));
-
- for (upto = 0, i = 0; upto < len; upto += todo, i++) {
- todo = MIN(len - upto, (1 << 15));
- spi_rx_tx(regs, todo, (void *)(sram_addr),
- (void *)(spi_addr), i);
- }
-
- setbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
-
- /*
- * Let put controller mode to BYTE as
- * SPI driver does not support WORD mode yet
- */
- clrbits_le32(&regs->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
- SPI_MODE_BUS_WIDTH_WORD);
- writel(0, &regs->swap_cfg);
-
- /*
- * Flush spi tx, rx fifos and reset the SPI controller
- * and clear rx/tx channel
- */
- clrsetbits_le32(&regs->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
- clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
- clrbits_le32(&regs->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
-}
-
/* Pull mode */
#define EXYNOS_GPIO_PULL_NONE 0x0
#define EXYNOS_GPIO_PULL_DOWN 0x1
@@ -854,21 +626,15 @@ void do_barriers(void)
);
}
-void sdelay(unsigned long loops);
-void sdelay(unsigned long loops)
-{
- __asm__ volatile ("1:\n" "subs %0, %1, #1\n"
- "bne 1b":"=r" (loops):"0"(loops));
-}
-
/* is this right? meh, it seems to work well enough... */
void my_udelay(unsigned int n);
void my_udelay(unsigned int n)
{
- sdelay(n * 1000);
+ n *= 1000;
+ __asm__ volatile ("1:\n" "subs %0, %1, #1\n"
+ "bne 1b":"=r" (n):"0"(n));
}
-
void i2c_init(int speed, int slaveadd)
{
struct s3c24x0_i2c_bus *i2c = &i2c0;
@@ -2145,13 +1911,6 @@ void bootblock_mainboard_init(void)
do_serial();
printk(BIOS_INFO, "%s: UART initialized\n", __func__);
- /* Copy romstage data from SPI ROM to SRAM */
- printk(BIOS_INFO, "Copying romstage:\n"
- "\tSPI offset: 0x%06x\n"
- "\tiRAM offset: 0x%08x\n"
- "\tSize: 0x%x\n",
- 0, CONFIG_SPI_IMAGE_HACK, CONFIG_ROMSTAGE_SIZE);
- copy_romstage(0x0, CONFIG_SPI_IMAGE_HACK, CONFIG_ROMSTAGE_SIZE);
#if 0
/* FIXME: dump SRAM content for sanity checking */
uint32_t u;