[U-Boot] [PATCH] ColdFire: Add SSPI feature for MCF5445x
Tsi-Chung Liew
Tsi-Chung.Liew at freescale.com
Tue Aug 12 15:15:52 CEST 2008
From: TsiChung Liew <Tsi-Chung.Liew at freescale.com>
Signed-off-by: TsiChung Liew <Tsi-Chung.Liew at freescale.com>
---
cpu/mcf5445x/dspi.c | 178 +++++++++++++++++++++++++++++++++++++++++--
include/configs/M54455EVB.h | 16 ++++-
lib_m68k/board.c | 17 ++++
3 files changed, 204 insertions(+), 7 deletions(-)
diff --git a/cpu/mcf5445x/dspi.c b/cpu/mcf5445x/dspi.c
index 44d8505..959d6bd 100644
--- a/cpu/mcf5445x/dspi.c
+++ b/cpu/mcf5445x/dspi.c
@@ -27,9 +27,11 @@
#include <common.h>
#include <spi.h>
+#include <malloc.h>
#if defined(CONFIG_CF_DSPI)
#include <asm/immap.h>
+
void dspi_init(void)
{
volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
@@ -45,11 +47,30 @@ void dspi_init(void)
DSPI_DMCR_CSIS2 | DSPI_DMCR_CSIS1 | DSPI_DMCR_CSIS0 |
DSPI_DMCR_CRXF | DSPI_DMCR_CTXF;
- dspi->dctar0 = DSPI_DCTAR_TRSZ(7) | DSPI_DCTAR_CPOL | DSPI_DCTAR_CPHA |
- DSPI_DCTAR_PCSSCK_1CLK | DSPI_DCTAR_PASC(0) |
- DSPI_DCTAR_PDT(0) | DSPI_DCTAR_CSSCK(0) |
- DSPI_DCTAR_ASC(0) | DSPI_DCTAR_PBR(0) |
- DSPI_DCTAR_DT(1) | DSPI_DCTAR_BR(1);
+#ifdef CFG_DSPI_DCTAR0
+ dspi->dctar0 = CFG_DSPI_DCTAR0;
+#endif
+#ifdef CFG_DSPI_DCTAR1
+ dspi->dctar1 = CFG_DSPI_DCTAR1;
+#endif
+#ifdef CFG_DSPI_DCTAR2
+ dspi->dctar2 = CFG_DSPI_DCTAR2;
+#endif
+#ifdef CFG_DSPI_DCTAR3
+ dspi->dctar3 = CFG_DSPI_DCTAR3;
+#endif
+#ifdef CFG_DSPI_DCTAR4
+ dspi->dctar4 = CFG_DSPI_DCTAR4;
+#endif
+#ifdef CFG_DSPI_DCTAR5
+ dspi->dctar5 = CFG_DSPI_DCTAR5;
+#endif
+#ifdef CFG_DSPI_DCTAR6
+ dspi->dctar6 = CFG_DSPI_DCTAR6;
+#endif
+#ifdef CFG_DSPI_DCTAR7
+ dspi->dctar7 = CFG_DSPI_DCTAR7;
+#endif
}
void dspi_tx(int chipsel, u8 attrib, u16 data)
@@ -70,4 +91,149 @@ u16 dspi_rx(void)
return (dspi->drfr & 0xFFFF);
}
-#endif /* CONFIG_HARD_SPI */
+#if defined(CONFIG_CMD_SPI)
+void spi_init_f(void)
+{
+}
+
+void spi_init_r(void)
+{
+}
+
+void spi_init(void)
+{
+ dspi_init();
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int mode)
+{
+ struct spi_slave *slave;
+
+ slave = malloc(sizeof(struct spi_slave));
+ if (!slave)
+ return NULL;
+
+ slave->bus = bus;
+ slave->cs = cs;
+
+ return slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ free(slave);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+ void *din, unsigned long flags)
+{
+ static int bWrite = 0;
+ u8 *spi_rd, *spi_wr;
+ int len = bitlen >> 3;
+
+ spi_rd = (u8 *) din;
+ spi_wr = (u8 *) dout;
+
+ /* command handling */
+ if (((len == 4) || (len == 1) || (len == 5)) && (dout != NULL)) {
+ switch (*spi_wr) {
+ case 0x02: /* Page Prog */
+ bWrite = 1;
+ dspi_tx(slave->cs, 0x80, spi_wr[0]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[1]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[2]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[3]);
+ dspi_rx();
+ return 0;
+ case 0x05: /* Read Status */
+ if (len == 4)
+ if ((spi_wr[1] == 0xFF) && (spi_wr[2] == 0xFF)
+ && (spi_wr[3] == 0xFF)) {
+ dspi_tx(slave->cs, 0x80, *spi_wr);
+ dspi_rx();
+ }
+ return 0;
+ case 0x06: /* WREN */
+ dspi_tx(slave->cs, 0x00, *spi_wr);
+ dspi_rx();
+ return 0;
+ case 0x0B: /* Fast read */
+ if ((len == 5) && (spi_wr[4] == 0)) {
+ dspi_tx(slave->cs, 0x80, spi_wr[0]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[1]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[2]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[3]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[4]);
+ dspi_rx();
+ }
+ return 0;
+ case 0x9F: /* RDID */
+ dspi_tx(slave->cs, 0x80, *spi_wr);
+ dspi_rx();
+ return 0;
+ case 0xD8: /* Sector erase */
+ if (len == 4)
+ if ((spi_wr[2] == 0) && (spi_wr[3] == 0)) {
+ dspi_tx(slave->cs, 0x80, spi_wr[0]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[1]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x80, spi_wr[2]);
+ dspi_rx();
+ dspi_tx(slave->cs, 0x00, spi_wr[3]);
+ dspi_rx();
+ }
+ return 0;
+ }
+ }
+
+ if (bWrite)
+ len--;
+
+ while (len--) {
+ if (dout != NULL) {
+ dspi_tx(slave->cs, 0x80, *spi_wr);
+ dspi_rx();
+ spi_wr++;
+ }
+
+ if (din != NULL) {
+ dspi_tx(slave->cs, 0x80, 0);
+ *spi_rd = dspi_rx();
+ spi_rd++;
+ }
+ }
+
+ if (flags == SPI_XFER_END) {
+ if (bWrite) {
+ dspi_tx(slave->cs, 0x00, *spi_wr);
+ dspi_rx();
+ bWrite = 0;
+ } else {
+ dspi_tx(slave->cs, 0x00, 0);
+ dspi_rx();
+ }
+ }
+
+ return 0;
+}
+#endif /* CONFIG_CMD_SPI */
+
+#endif /* CONFIG_CF_DSPI */
diff --git a/include/configs/M54455EVB.h b/include/configs/M54455EVB.h
index 82942d0..936766a 100644
--- a/include/configs/M54455EVB.h
+++ b/include/configs/M54455EVB.h
@@ -76,6 +76,7 @@
#undef CONFIG_CMD_PCI
#define CONFIG_CMD_PING
#define CONFIG_CMD_REGINFO
+#define CONFIG_CMD_SPI
#undef CONFIG_CMD_LOADB
#undef CONFIG_CMD_LOADS
@@ -173,7 +174,20 @@
/* DSPI and Serial Flash */
#define CONFIG_CF_DSPI
-#define CONFIG_SERIAL_FLASH
+#define CONFIG_HARD_SPI
+#ifdef CONFIG_CMD_SPI
+# define CFG_DSPI_DCTAR0 (DSPI_DCTAR_TRSZ(7) | \
+ DSPI_DCTAR_CPOL | \
+ DSPI_DCTAR_CPHA | \
+ DSPI_DCTAR_PCSSCK_1CLK | \
+ DSPI_DCTAR_PASC(0) | \
+ DSPI_DCTAR_PDT(0) | \
+ DSPI_DCTAR_CSSCK(0) | \
+ DSPI_DCTAR_ASC(0) | \
+ DSPI_DCTAR_PBR(0) | \
+ DSPI_DCTAR_DT(1) | \
+ DSPI_DCTAR_BR(1))
+#endif
/* PCI */
#ifdef CONFIG_CMD_PCI
diff --git a/lib_m68k/board.c b/lib_m68k/board.c
index a13ea26..dedc9e4 100644
--- a/lib_m68k/board.c
+++ b/lib_m68k/board.c
@@ -59,6 +59,10 @@
#include <i2c.h>
#endif
+#ifdef CONFIG_CMD_SPI
+#include <spi.h>
+#endif
+
DECLARE_GLOBAL_DATA_PTR;
static char *failed = "*** failed ***\n";
@@ -212,6 +216,16 @@ static int init_func_i2c (void)
}
#endif
+#if defined(CONFIG_HARD_SPI)
+static int init_func_spi (void)
+{
+ puts ("SPI: ");
+ spi_init ();
+ puts ("ready\n");
+ return (0);
+}
+#endif
+
/***********************************************************************/
/************************************************************************
@@ -231,6 +245,9 @@ init_fnc_t *init_sequence[] = {
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
init_func_i2c,
#endif
+#if defined(CONFIG_HARD_SPI)
+ init_func_spi,
+#endif
init_func_ram,
#if defined(CFG_DRAM_TEST)
testdram,
--
1.5.6.4
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