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openwrt/target/linux/mpc83xx/patches-3.8/202-ata-add-pata_rbppc_cf-driver.patch
Gabor Juhos 9ec9adf3ea mpc83xx: add support for 3.8 
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 35736
2013-02-21 20:39:22 +00:00

728 lines
20 KiB
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--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -916,5 +916,12 @@ config PATA_LEGACY
If unsure, say N.
+config PATA_RB_PPC
+ tristate "MikroTik RB600 PATA support"
+ depends on RB_PPC
+ help
+ This option enables support for PATA devices on MikroTik RouterBOARD
+ 600 series boards.
+
endif # ATA_SFF
endif # ATA
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -91,6 +91,7 @@ obj-$(CONFIG_PATA_PALMLD) += pata_palmld
obj-$(CONFIG_PATA_PLATFORM) += pata_platform.o
obj-$(CONFIG_PATA_OF_PLATFORM) += pata_of_platform.o
obj-$(CONFIG_PATA_RB532) += pata_rb532_cf.o
+obj-$(CONFIG_PATA_RB_PPC) += pata_rbppc_cf.o
obj-$(CONFIG_PATA_RZ1000) += pata_rz1000.o
obj-$(CONFIG_PATA_SAMSUNG_CF) += pata_samsung_cf.o
--- /dev/null
+++ b/drivers/ata/pata_rbppc_cf.c
@@ -0,0 +1,699 @@
+/*
+ * Copyright (C) 2008-2009 Noah Fontes <nfontes@transtruct.org>
+ * Copyright (C) Mikrotik 2007
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/of_platform.h>
+#include <linux/ata_platform.h>
+#include <linux/slab.h>
+
+#define DEBUG_UPM 0
+
+#define DRV_NAME "pata_rbppc_cf"
+#define DRV_VERSION "0.0.2"
+
+#define DEV2SEL_OFFSET 0x00100000
+
+#define IMMR_LBCFG_OFFSET 0x00005000
+#define IMMR_LBCFG_SIZE 0x00001000
+
+#define LOCAL_BUS_MCMR 0x00000078
+#define MxMR_OP_MASK 0x30000000
+#define MxMR_OP_NORMAL 0x00000000
+#define MxMR_OP_WRITE 0x10000000
+#define MxMR_OP_READ 0x20000000
+#define MxMR_OP_RUN 0x30000000
+#define MxMR_LUPWAIT_LOW 0x08000000
+#define MxMR_LUPWAIT_HIGH 0x00000000
+#define MxMR_LUPWAIT_ENABLE 0x00040000
+#define MxMR_RLF_MASK 0x0003c000
+#define MxMR_RLF_SHIFT 14
+#define MxMR_WLF_MASK 0x00003c00
+#define MxMR_WLF_SHIFT 10
+#define MxMR_MAD_MASK 0x0000003f
+#define LOCAL_BUS_MDR 0x00000088
+#define LOCAL_BUS_LCRR 0x000000D4
+#define LCRR_CLKDIV_MASK 0x0000000f
+
+#define LOOP_SIZE 4
+
+#define UPM_READ_SINGLE_OFFSET 0x00
+#define UPM_WRITE_SINGLE_OFFSET 0x18
+#define UPM_DATA_SIZE 0x40
+
+#define LBT_CPUIN_MIN 0
+#define LBT_CPUOUT_MIN 1
+#define LBT_CPUOUT_MAX 2
+#define LBT_EXTDEL_MIN 3
+#define LBT_EXTDEL_MAX 4
+#define LBT_SIZE 5
+
+/* UPM machine configuration bits */
+#define N_BASE 0x00f00000
+#define N_CS 0xf0000000
+#define N_CS_H1 0xc0000000
+#define N_CS_H2 0x30000000
+#define N_WE 0x0f000000
+#define N_WE_H1 0x0c000000
+#define N_WE_H2 0x03000000
+#define N_OE 0x00030000
+#define N_OE_H1 0x00020000
+#define N_OE_H2 0x00010000
+#define WAEN 0x00001000
+#define REDO_2 0x00000100
+#define REDO_3 0x00000200
+#define REDO_4 0x00000300
+#define LOOP 0x00000080
+#define NA 0x00000008
+#define UTA 0x00000004
+#define LAST 0x00000001
+
+#define REDO_VAL(mult) (REDO_2 * ((mult) - 1))
+#define REDO_MAX_MULT 4
+
+#define READ_BASE (N_BASE | N_WE)
+#define WRITE_BASE (N_BASE | N_OE)
+#define EMPTY (N_BASE | N_CS | N_OE | N_WE | LAST)
+
+#define EOF_UPM_SETTINGS 0
+#define ANOTHER_TIMING 1
+
+#define OA_CPUIN_MIN 0x01
+#define OA_CPUOUT_MAX 0x02
+#define OD_CPUOUT_MIN 0x04
+#define OA_CPUOUT_DELTA 0x06
+#define OA_EXTDEL_MAX 0x08
+#define OD_EXTDEL_MIN 0x10
+#define OA_EXTDEL_DELTA 0x18
+#define O_MIN_CYCLE_TIME 0x20
+#define O_MINUS_PREV 0x40
+#define O_HALF_CYCLE 0x80
+
+extern void __iomem *localbus_map(unsigned long addr, unsigned int len);
+extern void localbus_unmap(void __iomem *addr);
+
+struct rbppc_cf_info {
+ unsigned lbcfg_addr;
+ unsigned clk_time_ps;
+ int cur_mode;
+ u32 lb_timings[LBT_SIZE];
+};
+static struct rbppc_cf_info *rbinfo = NULL;
+
+struct upm_setting {
+ unsigned value;
+ unsigned ns[7];
+ unsigned clk_minus;
+ unsigned group_size;
+ unsigned options;
+};
+
+static const struct upm_setting cfUpmReadSingle[] = {
+ { READ_BASE | N_OE,
+ /* t1 - ADDR setup time */
+ { 70, 50, 30, 30, 25, 15, 10 }, 0, 0, (OA_CPUOUT_DELTA |
+ OA_EXTDEL_MAX) },
+ { READ_BASE | N_OE_H1,
+ { 0, 0, 0, 0, 0, 0, 0 }, 0, 0, O_HALF_CYCLE },
+ { READ_BASE,
+ /* t2 - OE0 time */
+ { 290, 290, 290, 80, 70, 65, 55 }, 0, 2, (OA_CPUOUT_MAX |
+ OA_CPUIN_MIN) },
+ { READ_BASE | WAEN,
+ { 1, 1, 1, 1, 1, 0, 0 }, 0, 0, 0 },
+ { READ_BASE | UTA,
+ { 1, 1, 1, 1, 1, 1, 1 }, 0, 0, 0 },
+ { READ_BASE | N_OE,
+ /* t9 - ADDR hold time */
+ { 20, 15, 10, 10, 10, 10, 10 }, 0, 0, (OA_CPUOUT_DELTA |
+ OD_EXTDEL_MIN) },
+ { READ_BASE | N_OE | N_CS_H2,
+ { 0, 0, 0, 0, 0, 0, 0 }, 0, 0, O_HALF_CYCLE },
+ { READ_BASE | N_OE | N_CS,
+ /* t6Z -IORD data tristate */
+ { 30, 30, 30, 30, 30, 20, 20 }, 1, 1, O_MINUS_PREV },
+ { ANOTHER_TIMING,
+ /* t2i -IORD recovery time */
+ { 0, 0, 0, 70, 25, 25, 20 }, 2, 0, 0 },
+ { ANOTHER_TIMING,
+ /* CS 0 -> 1 MAX */
+ { 0, 0, 0, 0, 0, 0, 0 }, 1, 0, (OA_CPUOUT_DELTA |
+ OA_EXTDEL_MAX) },
+ { READ_BASE | N_OE | N_CS | LAST,
+ { 1, 1, 1, 1, 1, 1, 1 }, 0, 0, 0 },
+ { EOF_UPM_SETTINGS,
+ /* min total cycle time - includes turnaround and ALE cycle */
+ { 600, 383, 240, 180, 120, 100, 80 }, 2, 0, O_MIN_CYCLE_TIME },
+};
+
+static const struct upm_setting cfUpmWriteSingle[] = {
+ { WRITE_BASE | N_WE,
+ /* t1 - ADDR setup time */
+ { 70, 50, 30, 30, 25, 15, 10 }, 0, 0, (OA_CPUOUT_DELTA |
+ OA_EXTDEL_MAX) },
+ { WRITE_BASE | N_WE_H1,
+ { 0, 0, 0, 0, 0, 0, 0 }, 0, 0, O_HALF_CYCLE },
+ { WRITE_BASE,
+ /* t2 - WE0 time */
+ { 290, 290, 290, 80, 70, 65, 55 }, 0, 1, OA_CPUOUT_DELTA },
+ { WRITE_BASE | WAEN,
+ { 1, 1, 1, 1, 1, 0, 0 }, 0, 0, 0 },
+ { WRITE_BASE | N_WE,
+ /* t9 - ADDR hold time */
+ { 20, 15, 10, 10, 10, 10, 10 }, 0, 0, (OA_CPUOUT_DELTA |
+ OD_EXTDEL_MIN) },
+ { WRITE_BASE | N_WE | N_CS_H2,
+ { 0, 0, 0, 0, 0, 0, 0 }, 0, 0, O_HALF_CYCLE },
+ { WRITE_BASE | N_WE | N_CS,
+ /* t4 - DATA hold time */
+ { 30, 20, 15, 10, 10, 10, 10 }, 0, 1, O_MINUS_PREV },
+ { ANOTHER_TIMING,
+ /* t2i -IOWR recovery time */
+ { 0, 0, 0, 70, 25, 25, 20 }, 1, 0, 0 },
+ { ANOTHER_TIMING,
+ /* CS 0 -> 1 MAX */
+ { 0, 0, 0, 0, 0, 0, 0 }, 0, 0, (OA_CPUOUT_DELTA |
+ OA_EXTDEL_MAX) },
+ { WRITE_BASE | N_WE | N_CS | UTA | LAST,
+ { 1, 1, 1, 1, 1, 1, 1 }, 0, 0, 0 },
+ /* min total cycle time - includes ALE cycle */
+ { EOF_UPM_SETTINGS,
+ { 600, 383, 240, 180, 120, 100, 80 }, 1, 0, O_MIN_CYCLE_TIME },
+};
+
+static u8 rbppc_cf_check_status(struct ata_port *ap) {
+ u8 val = ioread8(ap->ioaddr.status_addr);
+ if (val == 0xF9)
+ val = 0x7F;
+ return val;
+}
+
+static u8 rbppc_cf_check_altstatus(struct ata_port *ap) {
+ u8 val = ioread8(ap->ioaddr.altstatus_addr);
+ if (val == 0xF9)
+ val = 0x7F;
+ return val;
+}
+
+static void rbppc_cf_dummy_noret(struct ata_port *ap) { }
+static int rbppc_cf_dummy_ret0(struct ata_port *ap) { return 0; }
+
+static int ps2clk(int ps, unsigned clk_time_ps) {
+ int psMaxOver;
+ if (ps <= 0) return 0;
+
+ /* round down if <= 2% over clk border, but no more than 1/4 clk cycle */
+ psMaxOver = ps * 2 / 100;
+ if (4 * psMaxOver > clk_time_ps) {
+ psMaxOver = clk_time_ps / 4;
+ }
+ return (ps + clk_time_ps - 1 - psMaxOver) / clk_time_ps;
+}
+
+static int upm_gen_ps_table(const struct upm_setting *upm,
+ int mode, struct rbppc_cf_info *info,
+ int *psFinal) {
+ int uidx;
+ int lastUpmValIdx = 0;
+ int group_start_idx = -1;
+ int group_left_num = -1;
+ int clk_time_ps = info->clk_time_ps;
+
+ for (uidx = 0; upm[uidx].value != EOF_UPM_SETTINGS; ++uidx) {
+ const struct upm_setting *us = upm + uidx;
+ unsigned opt = us->options;
+ int ps = us->ns[mode] * 1000 - us->clk_minus * clk_time_ps;
+
+ if (opt & OA_CPUIN_MIN) ps += info->lb_timings[LBT_CPUIN_MIN];
+ if (opt & OD_CPUOUT_MIN) ps -= info->lb_timings[LBT_CPUOUT_MIN];
+ if (opt & OA_CPUOUT_MAX) ps += info->lb_timings[LBT_CPUOUT_MAX];
+ if (opt & OD_EXTDEL_MIN) ps -= info->lb_timings[LBT_EXTDEL_MIN];
+ if (opt & OA_EXTDEL_MAX) ps += info->lb_timings[LBT_EXTDEL_MAX];
+
+ if (us->value == ANOTHER_TIMING) {
+ /* use longest timing from alternatives */
+ if (psFinal[lastUpmValIdx] < ps) {
+ psFinal[lastUpmValIdx] = ps;
+ }
+ ps = 0;
+ }
+ else {
+ if (us->group_size) {
+ group_start_idx = uidx;
+ group_left_num = us->group_size;
+ }
+ else if (group_left_num > 0) {
+ /* group time is divided on all group members */
+ int clk = ps2clk(ps, clk_time_ps);
+ psFinal[group_start_idx] -= clk * clk_time_ps;
+ --group_left_num;
+ }
+ if ((opt & O_MINUS_PREV) && lastUpmValIdx > 0) {
+ int clk = ps2clk(psFinal[lastUpmValIdx],
+ clk_time_ps);
+ ps -= clk * clk_time_ps;
+ }
+ lastUpmValIdx = uidx;
+ }
+ psFinal[uidx] = ps;
+ }
+ return uidx;
+}
+
+static int free_half(int ps, int clk, int clk_time_ps) {
+ if (clk < 2) return 0;
+ return (clk * clk_time_ps - ps) * 2 >= clk_time_ps;
+}
+
+static void upm_gen_clk_table(const struct upm_setting *upm,
+ int mode, int clk_time_ps,
+ int max_uidx, const int *psFinal, int *clkFinal) {
+ int clk_cycle_time;
+ int clk_total;
+ int uidx;
+
+ /* convert picoseconds to clocks */
+ clk_total = 0;
+ for (uidx = 0; uidx < max_uidx; ++uidx) {
+ int clk = ps2clk(psFinal[uidx], clk_time_ps);
+ clkFinal[uidx] = clk;
+ clk_total += clk;
+ }
+
+ /* check possibility of half cycle usage */
+ for (uidx = 1; uidx < max_uidx - 1; ++uidx) {
+ if ((upm[uidx].options & O_HALF_CYCLE) &&
+ free_half(psFinal[uidx - 1], clkFinal[uidx - 1],
+ clk_time_ps) &&
+ free_half(psFinal[uidx + 1], clkFinal[uidx + 1],
+ clk_time_ps)) {
+ ++clkFinal[uidx];
+ --clkFinal[uidx - 1];
+ --clkFinal[uidx + 1];
+ }
+ }
+
+ if ((upm[max_uidx].options & O_MIN_CYCLE_TIME) == 0) return;
+
+ /* check cycle time, adjust timings if needed */
+ clk_cycle_time = (ps2clk(upm[max_uidx].ns[mode] * 1000, clk_time_ps) -
+ upm[max_uidx].clk_minus);
+ uidx = 0;
+ while (clk_total < clk_cycle_time) {
+ /* extend all timings in round-robin to match cycle time */
+ if (clkFinal[uidx]) {
+#if DEBUG_UPM
+ printk(KERN_INFO "extending %u by 1 clk\n", uidx);
+#endif
+ ++clkFinal[uidx];
+ ++clk_total;
+ }
+ ++uidx;
+ if (uidx == max_uidx) uidx = 0;
+ }
+}
+
+static void add_data_val(unsigned val, int *clkLeft, int maxClk,
+ unsigned *data, int *dataIdx) {
+ if (*clkLeft == 0) return;
+
+ if (maxClk == 0 && *clkLeft >= LOOP_SIZE * 2) {
+ int times;
+ int times1;
+ int times2;
+
+ times = *clkLeft / LOOP_SIZE;
+ if (times > REDO_MAX_MULT * 2) times = REDO_MAX_MULT * 2;
+ times1 = times / 2;
+ times2 = times - times1;
+
+ val |= LOOP;
+ data[*dataIdx] = val | REDO_VAL(times1);
+ ++(*dataIdx);
+ data[*dataIdx] = val | REDO_VAL(times2);
+ ++(*dataIdx);
+
+ *clkLeft -= times * LOOP_SIZE;
+ return;
+ }
+
+ if (maxClk < 1 || maxClk > REDO_MAX_MULT) maxClk = REDO_MAX_MULT;
+ if (*clkLeft < maxClk) maxClk = *clkLeft;
+
+ *clkLeft -= maxClk;
+ val |= REDO_VAL(maxClk);
+
+ data[*dataIdx] = val;
+ ++(*dataIdx);
+}
+
+static int upm_gen_final_data(const struct upm_setting *upm,
+ int max_uidx, int *clkFinal, unsigned *data) {
+ int dataIdx;
+ int uidx;
+
+ dataIdx = 0;
+ for (uidx = 0; uidx < max_uidx; ++uidx) {
+ int clk = clkFinal[uidx];
+ while (clk > 0) {
+ add_data_val(upm[uidx].value, &clk, 0,
+ data, &dataIdx);
+ }
+ }
+ return dataIdx;
+}
+
+static int conv_upm_table(const struct upm_setting *upm,
+ int mode, struct rbppc_cf_info *info,
+ unsigned *data) {
+#if DEBUG_UPM
+ int uidx;
+#endif
+ int psFinal[32];
+ int clkFinal[32];
+ int max_uidx;
+ int data_len;
+
+ max_uidx = upm_gen_ps_table(upm, mode, info, psFinal);
+
+ upm_gen_clk_table(upm, mode, info->clk_time_ps, max_uidx,
+ psFinal, clkFinal);
+
+#if DEBUG_UPM
+ /* dump out debug info */
+ for (uidx = 0; uidx < max_uidx; ++uidx) {
+ if (clkFinal[uidx]) {
+ printk(KERN_INFO "idx %d val %08x clk %d ps %d\n",
+ uidx, upm[uidx].value,
+ clkFinal[uidx], psFinal[uidx]);
+ }
+ }
+#endif
+
+ data_len = upm_gen_final_data(upm, max_uidx, clkFinal, data);
+
+#if DEBUG_UPM
+ for (uidx = 0; uidx < data_len; ++uidx) {
+ printk(KERN_INFO "cf UPM x result: idx %d val %08x\n",
+ uidx, data[uidx]);
+ }
+#endif
+ return 0;
+}
+
+static int gen_upm_data(int mode, struct rbppc_cf_info *info, unsigned *data) {
+ int i;
+
+ for (i = 0; i < UPM_DATA_SIZE; ++i) {
+ data[i] = EMPTY;
+ }
+
+ if (conv_upm_table(cfUpmReadSingle, mode, info, data + UPM_READ_SINGLE_OFFSET)) {
+ return -1;
+ }
+ if (conv_upm_table(cfUpmWriteSingle, mode, info, data + UPM_WRITE_SINGLE_OFFSET)) {
+ return -1;
+ }
+ return 0;
+}
+
+static void rbppc_cf_program_upm(void *upmMemAddr, volatile void *lbcfg_mxmr, volatile void *lbcfg_mdr, const unsigned *upmData, unsigned offset, unsigned len) {
+ unsigned i;
+ unsigned mxmr;
+
+ mxmr = in_be32(lbcfg_mxmr);
+ mxmr &= ~(MxMR_OP_MASK | MxMR_MAD_MASK);
+ mxmr |= (MxMR_OP_WRITE | offset);
+ out_be32(lbcfg_mxmr, mxmr);
+ in_be32(lbcfg_mxmr); /* flush MxMR write */
+
+ for (i = 0; i < len; ++i) {
+ int to;
+ unsigned data = upmData[i + offset];
+ out_be32(lbcfg_mdr, data);
+ in_be32(lbcfg_mdr); /* flush MDR write */
+
+ iowrite8(1, upmMemAddr); /* dummy write to any CF addr */
+
+ /* wait for dummy write to complete */
+ for (to = 10000; to >= 0; --to) {
+ mxmr = in_be32(lbcfg_mxmr);
+ if (((mxmr ^ (i + 1)) & MxMR_MAD_MASK) == 0) {
+ break;
+ }
+ if (to == 0) {
+ printk(KERN_ERR "rbppc_cf_program_upm: UPMx program error at 0x%x: Timeout\n", i);
+ }
+ }
+ }
+ mxmr &= ~(MxMR_OP_MASK | MxMR_RLF_MASK | MxMR_WLF_MASK);
+ mxmr |= (MxMR_OP_NORMAL | (LOOP_SIZE << MxMR_RLF_SHIFT) | (LOOP_SIZE << MxMR_WLF_SHIFT));
+ out_be32(lbcfg_mxmr, mxmr);
+}
+
+static int rbppc_cf_update_piomode(struct ata_port *ap, int mode) {
+ struct rbppc_cf_info *info = (struct rbppc_cf_info *)ap->host->private_data;
+ void *lbcfgBase;
+ unsigned upmData[UPM_DATA_SIZE];
+
+ if (gen_upm_data(mode, info, upmData)) {
+ return -1;
+ }
+
+ lbcfgBase = ioremap_nocache(info->lbcfg_addr, IMMR_LBCFG_SIZE);
+
+ rbppc_cf_program_upm(ap->ioaddr.cmd_addr, ((char *)lbcfgBase) + LOCAL_BUS_MCMR, ((char *)lbcfgBase) + LOCAL_BUS_MDR, upmData, 0, UPM_DATA_SIZE);
+ iounmap(lbcfgBase);
+ return 0;
+}
+
+static void rbppc_cf_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct rbppc_cf_info *info = (struct rbppc_cf_info *)ap->host->private_data;
+ int mode = adev->pio_mode - XFER_PIO_0;
+
+ DPRINTK("rbppc_cf_set_piomode: PIO %d\n", mode);
+ if (mode < 0) mode = 0;
+ if (mode > 6) mode = 6;
+
+ if (info->cur_mode < 0 || info->cur_mode > mode) {
+ if (rbppc_cf_update_piomode(ap, mode) == 0) {
+ printk(KERN_INFO "rbppc_cf_set_piomode: PIO mode changed to %d\n", mode);
+ info->cur_mode = mode;
+ }
+ }
+}
+
+static struct scsi_host_template rbppc_cf_sht = {
+ ATA_BASE_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations rbppc_cf_port_ops = {
+ .inherits = &ata_bmdma_port_ops,
+
+ .sff_check_status = rbppc_cf_check_status,
+ .sff_check_altstatus = rbppc_cf_check_altstatus,
+
+ .set_piomode = rbppc_cf_set_piomode,
+
+ .port_start = rbppc_cf_dummy_ret0,
+
+ .sff_irq_clear = rbppc_cf_dummy_noret,
+};
+
+static int rbppc_cf_init_info(struct platform_device *pdev, struct rbppc_cf_info *info) {
+ struct device_node *np;
+ struct resource res;
+ const u32 *u32ptr;
+ void *lbcfgBase;
+ void *lbcfg_lcrr;
+ unsigned lbc_clk_khz;
+ unsigned lbc_extra_divider = 1;
+ unsigned ccb_freq_hz;
+ unsigned lb_div;
+
+ u32ptr = of_get_property(pdev->dev.of_node, "lbc_extra_divider", NULL);
+ if (u32ptr && *u32ptr) {
+ lbc_extra_divider = *u32ptr;
+#if DEBUG_UPM
+ printk(KERN_INFO "rbppc_cf_init_info: LBC extra divider %u\n",
+ lbc_extra_divider);
+#endif
+ }
+
+ np = of_find_node_by_type(NULL, "serial");
+ if (!np) {
+ printk(KERN_ERR "rbppc_cf_init_info: No serial node found\n");
+ return -1;
+ }
+ u32ptr = of_get_property(np, "clock-frequency", NULL);
+ if (u32ptr == 0 || *u32ptr == 0) {
+ printk(KERN_ERR "rbppc_cf_init_info: Serial does not have clock-frequency\n");
+ of_node_put(np);
+ return -1;
+ }
+ ccb_freq_hz = *u32ptr;
+ of_node_put(np);
+
+ np = of_find_node_by_type(NULL, "soc");
+ if (!np) {
+ printk(KERN_ERR "rbppc_cf_init_info: No soc node found\n");
+ return -1;
+ }
+ if (of_address_to_resource(np, 0, &res)) {
+ printk(KERN_ERR "rbppc_cf_init_info: soc does not have resource\n");
+ of_node_put(np);
+ return -1;
+ }
+ info->lbcfg_addr = res.start + IMMR_LBCFG_OFFSET;
+ of_node_put(np);
+
+ lbcfgBase = ioremap_nocache(info->lbcfg_addr, IMMR_LBCFG_SIZE);
+ lbcfg_lcrr = ((char*)lbcfgBase) + LOCAL_BUS_LCRR;
+ lb_div = (in_be32(lbcfg_lcrr) & LCRR_CLKDIV_MASK) * lbc_extra_divider;
+ iounmap(lbcfgBase);
+
+ lbc_clk_khz = ccb_freq_hz / (1000 * lb_div);
+ info->clk_time_ps = 1000000000 / lbc_clk_khz;
+ printk(KERN_INFO "rbppc_cf_init_info: Using Local-Bus clock %u kHz %u ps\n",
+ lbc_clk_khz, info->clk_time_ps);
+
+ u32ptr = of_get_property(pdev->dev.of_node, "lb-timings", NULL);
+ if (u32ptr) {
+ memcpy(info->lb_timings, u32ptr, LBT_SIZE * sizeof(*u32ptr));
+#if DEBUG_UPM
+ printk(KERN_INFO "rbppc_cf_init_info: Got LB timings <%u %u %u %u %u>\n",
+ u32ptr[0], u32ptr[1], u32ptr[2], u32ptr[3], u32ptr[4]);
+#endif
+ }
+ info->cur_mode = -1;
+ return 0;
+}
+
+static int rbppc_cf_probe(struct platform_device *pdev)
+{
+ struct ata_host *host;
+ struct ata_port *ap;
+ struct rbppc_cf_info *info = NULL;
+ struct resource res;
+ void *baddr;
+ const u32 *u32ptr;
+ int irq_level = 0;
+ int err = -ENOMEM;
+
+ printk(KERN_INFO "rbppc_cf_probe: MikroTik RouterBOARD 600 series Compact Flash PATA driver, version " DRV_VERSION "\n");
+
+ if (rbinfo == NULL) {
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (info == NULL) {
+ printk(KERN_ERR "rbppc_cf_probe: Out of memory\n");
+ goto err_info;
+ }
+ memset(info, 0, sizeof(*info));
+
+ if (rbppc_cf_init_info(pdev, info)) {
+ goto err_info;
+ }
+ rbinfo = info;
+ }
+
+ u32ptr = of_get_property(pdev->dev.of_node, "interrupt-at-level", NULL);
+ if (u32ptr) {
+ irq_level = *u32ptr;
+ printk(KERN_INFO "rbppc_cf_probe: IRQ level %u\n", irq_level);
+ }
+
+ if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
+ printk(KERN_ERR "rbppc_cf_probe: No reg property found\n");
+ goto err_info;
+ }
+
+ host = ata_host_alloc(&pdev->dev, 1);
+ if (!host)
+ goto err_info;
+
+ baddr = localbus_map(res.start, res.end - res.start + 1);
+ host->iomap = baddr;
+ host->private_data = rbinfo;
+
+ ap = host->ports[0];
+ ap->ops = &rbppc_cf_port_ops;
+ ap->pio_mask = 0x7F; /* PIO modes 0-6 */
+ ap->mwdma_mask = 0;
+
+ ap->ioaddr.cmd_addr = baddr;
+ ata_sff_std_ports(&ap->ioaddr);
+ ap->ioaddr.ctl_addr = ap->ioaddr.cmd_addr + 14;
+ ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
+ ap->ioaddr.bmdma_addr = 0;
+
+ err = ata_host_activate(
+ host,
+ irq_of_parse_and_map(pdev->dev.of_node, 0), ata_sff_interrupt,
+ irq_level ? IRQF_TRIGGER_HIGH : IRQF_TRIGGER_LOW,
+ &rbppc_cf_sht);
+ if (!err) return 0;
+
+ localbus_unmap(baddr);
+err_info:
+ if (info) {
+ kfree(info);
+ rbinfo = NULL;
+ }
+ return err;
+}
+
+static int rbppc_cf_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ata_host *host = dev_get_drvdata(dev);
+
+ if (host == NULL) return -1;
+
+ ata_host_detach(host);
+ return 0;
+}
+
+static struct of_device_id rbppc_cf_ids[] = {
+ { .name = "cf", },
+ { },
+};
+
+static struct platform_driver rbppc_cf_driver = {
+ .probe = rbppc_cf_probe,
+ .remove = rbppc_cf_remove,
+ .driver = {
+ .name = "rbppc-cf",
+ .owner = THIS_MODULE,
+ .of_match_table = rbppc_cf_ids,
+ },
+};
+
+static int __init rbppc_init(void)
+{
+ return platform_driver_register(&rbppc_cf_driver);
+}
+
+static void __exit rbppc_exit(void)
+{
+ platform_driver_unregister(&rbppc_cf_driver);
+}
+
+MODULE_AUTHOR("Mikrotikls SIA");
+MODULE_AUTHOR("Noah Fontes");
+MODULE_DESCRIPTION("MikroTik RouterBOARD 600 series Compact Flash PATA driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+module_init(rbppc_init);
+module_exit(rbppc_exit);
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