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authorRalph Kondziella <rk@argos-messtechnik.de>2009-01-26 12:34:36 -0700
committerJohn Rigby <jrigby@freescale.com>2009-02-03 15:40:29 -0700
commit70a4da45e16b72e8e5b0baaecdaee9be8619647d (patch)
tree7801efb95297a664c6ee2fac3839e5d5df5a9a0a /board/ads5121
parentabfbd0ae4967df18102345db4f4b529a13da107b (diff)
ADS5121 Add PATA support
Original patch from Ralph Kondziella plus clean up by Wolfgang Denk plus changes by John Rigby use ips clock not lpc port forward to current u-boot release Signed-off-by: Ralph Kondziella <rk@argos-messtechnik.de> Signed-off-by: Wolfgang Denk <wd@denx.de> Signed-off-by: John Rigby <jrigby@freescale.com>
Diffstat (limited to 'board/ads5121')
-rw-r--r--board/ads5121/ads5121.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/board/ads5121/ads5121.c b/board/ads5121/ads5121.c
index ae1ccd9443..6c40e94416 100644
--- a/board/ads5121/ads5121.c
+++ b/board/ads5121/ads5121.c
@@ -31,6 +31,8 @@
#include <i2c.h>
#endif
+DECLARE_GLOBAL_DATA_PTR;
+
/* Clocks in use */
#define SCCR1_CLOCKS_EN (CLOCK_SCCR1_CFG_EN | \
CLOCK_SCCR1_LPC_EN | \
@@ -38,6 +40,7 @@
CLOCK_SCCR1_PSCFIFO_EN | \
CLOCK_SCCR1_DDR_EN | \
CLOCK_SCCR1_FEC_EN | \
+ CLOCK_SCCR1_PATA_EN | \
CLOCK_SCCR1_PCI_EN | \
CLOCK_SCCR1_TPR_EN)
@@ -326,3 +329,104 @@ void ft_board_setup(void *blob, bd_t *bd)
fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
}
#endif /* defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) */
+
+#if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_RESET)
+
+void init_ide_reset (void)
+{
+ volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+ debug ("init_ide_reset\n");
+
+ /*
+ * Clear the reset bit to reset the interface
+ * cf. RefMan MPC5121EE: 28.4.1 Resetting the ATA Bus
+ */
+ immr->pata.pata_ata_control = 0;
+ udelay(100);
+ /* Assert the reset bit to enable the interface */
+ immr->pata.pata_ata_control = FSL_ATA_CTRL_ATA_RST_B;
+ udelay(100);
+
+}
+
+void ide_set_reset (int idereset)
+{
+ volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+ debug ("ide_set_reset(%d)\n", idereset);
+
+ if (idereset) {
+ immr->pata.pata_ata_control = 0;
+ udelay(100);
+ } else {
+ immr->pata.pata_ata_control = FSL_ATA_CTRL_ATA_RST_B;
+ udelay(100);
+ }
+}
+
+#define CALC_TIMING(t) (t + period - 1) / period
+
+int ide_preinit (void)
+{
+ volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+ long t;
+ const struct {
+ short t0;
+ short t1;
+ short t2_8;
+ short t2_16;
+ short t2i;
+ short t4;
+ short t9;
+ short tA;
+ } pio_specs = {
+ .t0 = 600,
+ .t1 = 70,
+ .t2_8 = 290,
+ .t2_16 = 165,
+ .t2i = 0,
+ .t4 = 30,
+ .t9 = 20,
+ .tA = 50,
+ };
+ union {
+ u32 config;
+ struct {
+ u8 field1;
+ u8 field2;
+ u8 field3;
+ u8 field4;
+ }bytes;
+ }cfg;
+
+ debug ("IDE preinit using PATA peripheral at IMMR-ADDR %08x\n",
+ (u32)&immr->pata);
+
+ /* Set the reset bit to 1 to enable the interface */
+ immr->pata.pata_ata_control = FSL_ATA_CTRL_ATA_RST_B;
+
+ /* Init timings : we use PIO mode 0 timings */
+ t = 1000000000 / gd->ips_clk; /* period in ns */
+ cfg.bytes.field1 = 3;
+ cfg.bytes.field2 = 3;
+ cfg.bytes.field3 = (pio_specs.t1 + t) / t;
+ cfg.bytes.field4 = (pio_specs.t2_8 + t) / t;
+
+ immr->pata.pata_time1 = cfg.config;
+
+ cfg.bytes.field1 = (pio_specs.t2_8 + t) / t;
+ cfg.bytes.field2 = (pio_specs.tA + t) / t + 2;
+ cfg.bytes.field3 = 1;
+ cfg.bytes.field4 = (pio_specs.t4 + t) / t;
+
+ immr->pata.pata_time2 = cfg.config;
+
+ cfg.config = immr->pata.pata_time3;
+ cfg.bytes.field1 = (pio_specs.t9 + t) / t;
+
+ immr->pata.pata_time3 = cfg.config;
+ debug ("PATA preinit complete.\n");
+
+ return 0;
+}
+
+#endif /* defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_RESET) */