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>

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) */