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-rw-r--r--arch/powerpc/cpu/mpc5xxx/ide.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc5xxx/ide.c b/arch/powerpc/cpu/mpc5xxx/ide.c
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+++ b/arch/powerpc/cpu/mpc5xxx/ide.c
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+/*
+ * (C) Copyright 2004
+ * Pierre AUBERT, Staubli Faverges, <p.aubert@staubli.com>
+ *
+ * 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
+ *
+ * Init is derived from Linux code.
+ */
+#include <common.h>
+
+#if defined(CONFIG_CMD_IDE)
+#include <mpc5xxx.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define CALC_TIMING(t) (t + period - 1) / period
+
+#ifdef CONFIG_IDE_RESET
+extern void init_ide_reset (void);
+#endif
+
+int ide_preinit (void)
+{
+ long period, t0, t1, t2_8, t2_16, t4, ta;
+ vu_long reg;
+ struct mpc5xxx_sdma *psdma = (struct mpc5xxx_sdma *) MPC5XXX_SDMA;
+
+ reg = *(vu_long *) MPC5XXX_GPS_PORT_CONFIG;
+#if defined(CONFIG_SYS_ATA_CS_ON_I2C2)
+ /* ATA cs0/1 on i2c2 clk/io */
+ reg = (reg & ~0x03000000ul) | 0x02000000ul;
+#elif defined(CONFIG_SYS_ATA_CS_ON_TIMER01)
+ /* ATA cs0/1 on Timer 0/1 */
+ reg = (reg & ~0x03000000ul) | 0x03000000ul;
+#else
+ /* ATA cs0/1 on Local Plus cs4/5 */
+ reg = (reg & ~0x03000000ul) | 0x01000000ul;
+#endif /* CONFIG_TOTAL5200 */
+ *(vu_long *) MPC5XXX_GPS_PORT_CONFIG = reg;
+
+ /* All sample codes do that... */
+ *(vu_long *) MPC5XXX_ATA_SHARE_COUNT = 0;
+
+#if defined(CONFIG_UC101)
+ /* Configure and reset host */
+ *(vu_long *) MPC5XXX_ATA_HOST_CONFIG =
+ MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR;
+ udelay (10);
+ *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = 0;
+#else
+ /* Configure and reset host */
+ *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY |
+ MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR;
+ udelay (10);
+ *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY;
+#endif
+
+ /* Disable prefetch on Commbus */
+ psdma->PtdCntrl |= 1;
+
+ /* Init timings : we use PIO mode 0 timings */
+ period = 1000000000 / gd->ipb_clk; /* period in ns */
+
+ t0 = CALC_TIMING (600);
+ t2_8 = CALC_TIMING (290);
+ t2_16 = CALC_TIMING (165);
+ reg = (t0 << 24) | (t2_8 << 16) | (t2_16 << 8);
+ *(vu_long *) MPC5XXX_ATA_PIO1 = reg;
+
+ t4 = CALC_TIMING (30);
+ t1 = CALC_TIMING (70);
+ ta = CALC_TIMING (35);
+ reg = (t4 << 24) | (t1 << 16) | (ta << 8);
+
+ *(vu_long *) MPC5XXX_ATA_PIO2 = reg;
+
+#ifdef CONFIG_IDE_RESET
+ init_ide_reset ();
+#endif /* CONFIG_IDE_RESET */
+
+ return (0);
+}
+#endif
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