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Message-Id: <1345247673-25086-2-git-send-email-ddaney.cavm@gmail.com>
Date: Fri, 17 Aug 2012 16:54:32 -0700
From: David Daney <ddaney.cavm@...il.com>
To: ralf@...ux-mips.org, linux-ide@...r.kernel.org,
Jeff Garzik <jgarzik@...ox.com>
Cc: linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
David Daney <david.daney@...ium.com>
Subject: [PATCH 1/2] MIPS/OCTEON/ata: Convert pata_octeon_cf.c to use device tree.
From: David Daney <david.daney@...ium.com>
The patch needs to eliminate the definition of OCTEON_IRQ_BOOTDMA so
that the device tree code can map the interrupt, so in order to not
temporarily break things, we do a single patch to both the interrupt
registration code and the pata_octeon_cf driver.
Also rolled in is a conversion to use hrtimers and corrections to the
timing calculations.
Signed-off-by: David Daney <david.daney@...ium.com>
---
arch/mips/cavium-octeon/octeon-irq.c | 1 -
arch/mips/cavium-octeon/octeon-platform.c | 102 ------
arch/mips/include/asm/mach-cavium-octeon/irq.h | 1 -
arch/mips/include/asm/octeon/octeon.h | 7 -
drivers/ata/pata_octeon_cf.c | 419 +++++++++++++++++--------
5 files changed, 284 insertions(+), 246 deletions(-)
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
index 274cd4f..5dcb88c 100644
--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -1213,7 +1213,6 @@ static void __init octeon_irq_init_ciu(void)
octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52);
octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 0, 56);
- octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_BOOTDMA, 0, 63);
/* CIU_1 */
for (i = 0; i < 16; i++)
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index 0938df1..3c1b625 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -24,108 +24,6 @@
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-helper-board.h>
-static struct octeon_cf_data octeon_cf_data;
-
-static int __init octeon_cf_device_init(void)
-{
- union cvmx_mio_boot_reg_cfgx mio_boot_reg_cfg;
- unsigned long base_ptr, region_base, region_size;
- struct platform_device *pd;
- struct resource cf_resources[3];
- unsigned int num_resources;
- int i;
- int ret = 0;
-
- /* Setup octeon-cf platform device if present. */
- base_ptr = 0;
- if (octeon_bootinfo->major_version == 1
- && octeon_bootinfo->minor_version >= 1) {
- if (octeon_bootinfo->compact_flash_common_base_addr)
- base_ptr =
- octeon_bootinfo->compact_flash_common_base_addr;
- } else {
- base_ptr = 0x1d000800;
- }
-
- if (!base_ptr)
- return ret;
-
- /* Find CS0 region. */
- for (i = 0; i < 8; i++) {
- mio_boot_reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(i));
- region_base = mio_boot_reg_cfg.s.base << 16;
- region_size = (mio_boot_reg_cfg.s.size + 1) << 16;
- if (mio_boot_reg_cfg.s.en && base_ptr >= region_base
- && base_ptr < region_base + region_size)
- break;
- }
- if (i >= 7) {
- /* i and i + 1 are CS0 and CS1, both must be less than 8. */
- goto out;
- }
- octeon_cf_data.base_region = i;
- octeon_cf_data.is16bit = mio_boot_reg_cfg.s.width;
- octeon_cf_data.base_region_bias = base_ptr - region_base;
- memset(cf_resources, 0, sizeof(cf_resources));
- num_resources = 0;
- cf_resources[num_resources].flags = IORESOURCE_MEM;
- cf_resources[num_resources].start = region_base;
- cf_resources[num_resources].end = region_base + region_size - 1;
- num_resources++;
-
-
- if (!(base_ptr & 0xfffful)) {
- /*
- * Boot loader signals availability of DMA (true_ide
- * mode) by setting low order bits of base_ptr to
- * zero.
- */
-
- /* Assume that CS1 immediately follows. */
- mio_boot_reg_cfg.u64 =
- cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(i + 1));
- region_base = mio_boot_reg_cfg.s.base << 16;
- region_size = (mio_boot_reg_cfg.s.size + 1) << 16;
- if (!mio_boot_reg_cfg.s.en)
- goto out;
-
- cf_resources[num_resources].flags = IORESOURCE_MEM;
- cf_resources[num_resources].start = region_base;
- cf_resources[num_resources].end = region_base + region_size - 1;
- num_resources++;
-
- octeon_cf_data.dma_engine = 0;
- cf_resources[num_resources].flags = IORESOURCE_IRQ;
- cf_resources[num_resources].start = OCTEON_IRQ_BOOTDMA;
- cf_resources[num_resources].end = OCTEON_IRQ_BOOTDMA;
- num_resources++;
- } else {
- octeon_cf_data.dma_engine = -1;
- }
-
- pd = platform_device_alloc("pata_octeon_cf", -1);
- if (!pd) {
- ret = -ENOMEM;
- goto out;
- }
- pd->dev.platform_data = &octeon_cf_data;
-
- ret = platform_device_add_resources(pd, cf_resources, num_resources);
- if (ret)
- goto fail;
-
- ret = platform_device_add(pd);
- if (ret)
- goto fail;
-
- return ret;
-fail:
- platform_device_put(pd);
-out:
- return ret;
-}
-device_initcall(octeon_cf_device_init);
-
/* Octeon Random Number Generator. */
static int __init octeon_rng_device_init(void)
{
diff --git a/arch/mips/include/asm/mach-cavium-octeon/irq.h b/arch/mips/include/asm/mach-cavium-octeon/irq.h
index c22a307..4eda022 100644
--- a/arch/mips/include/asm/mach-cavium-octeon/irq.h
+++ b/arch/mips/include/asm/mach-cavium-octeon/irq.h
@@ -41,7 +41,6 @@ enum octeon_irq {
OCTEON_IRQ_TIMER3,
OCTEON_IRQ_USB0,
OCTEON_IRQ_USB1,
- OCTEON_IRQ_BOOTDMA,
#ifndef CONFIG_PCI_MSI
OCTEON_IRQ_LAST = 127
#endif
diff --git a/arch/mips/include/asm/octeon/octeon.h b/arch/mips/include/asm/octeon/octeon.h
index 712f6b7..96e58a5 100644
--- a/arch/mips/include/asm/octeon/octeon.h
+++ b/arch/mips/include/asm/octeon/octeon.h
@@ -209,13 +209,6 @@ union octeon_cvmemctl {
} s;
};
-struct octeon_cf_data {
- unsigned long base_region_bias;
- unsigned int base_region; /* The chip select region used by CF */
- int is16bit; /* 0 - 8bit, !0 - 16bit */
- int dma_engine; /* -1 for no DMA */
-};
-
extern void octeon_write_lcd(const char *s);
extern void octeon_check_cpu_bist(void);
extern int octeon_get_boot_debug_flag(void);
diff --git a/drivers/ata/pata_octeon_cf.c b/drivers/ata/pata_octeon_cf.c
index 1d61d5d..652d035 100644
--- a/drivers/ata/pata_octeon_cf.c
+++ b/drivers/ata/pata_octeon_cf.c
@@ -5,17 +5,19 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2005 - 2009 Cavium Networks
+ * Copyright (C) 2005 - 2012 Cavium Inc.
* Copyright (C) 2008 Wind River Systems
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/libata.h>
-#include <linux/irq.h>
+#include <linux/hrtimer.h>
#include <linux/slab.h>
+#include <linux/irq.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
#include <linux/platform_device.h>
-#include <linux/workqueue.h>
#include <scsi/scsi_host.h>
#include <asm/octeon/octeon.h>
@@ -34,20 +36,36 @@
*/
#define DRV_NAME "pata_octeon_cf"
-#define DRV_VERSION "2.1"
+#define DRV_VERSION "2.2"
+
+/* Poll interval in nS. */
+#define OCTEON_CF_BUSY_POLL_INTERVAL 500000
+#define DMA_CFG 0
+#define DMA_TIM 0x20
+#define DMA_INT 0x38
+#define DMA_INT_EN 0x50
struct octeon_cf_port {
- struct workqueue_struct *wq;
- struct delayed_work delayed_finish;
+ struct hrtimer delayed_finish;
struct ata_port *ap;
int dma_finished;
+ void *c0;
+ unsigned int cs0;
+ unsigned int cs1;
+ bool is_true_ide;
+ u64 dma_base;
};
static struct scsi_host_template octeon_cf_sht = {
ATA_PIO_SHT(DRV_NAME),
};
+static int enable_dma;
+module_param(enable_dma, int, 0444);
+MODULE_PARM_DESC(enable_dma,
+ "Enable use of DMA on interfaces that support it (0=no dma [default], 1=use dma)");
+
/**
* Convert nanosecond based time to setting used in the
* boot bus timing register, based on timing multiple
@@ -66,12 +84,29 @@ static unsigned int ns_to_tim_reg(unsigned int tim_mult, unsigned int nsecs)
return val;
}
-static void octeon_cf_set_boot_reg_cfg(int cs)
+static void octeon_cf_set_boot_reg_cfg(int cs, unsigned int multiplier)
{
union cvmx_mio_boot_reg_cfgx reg_cfg;
+ unsigned int tim_mult;
+
+ switch (multiplier) {
+ case 8:
+ tim_mult = 3;
+ break;
+ case 4:
+ tim_mult = 0;
+ break;
+ case 2:
+ tim_mult = 2;
+ break;
+ default:
+ tim_mult = 1;
+ break;
+ }
+
reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs));
reg_cfg.s.dmack = 0; /* Don't assert DMACK on access */
- reg_cfg.s.tim_mult = 2; /* Timing mutiplier 2x */
+ reg_cfg.s.tim_mult = tim_mult; /* Timing mutiplier */
reg_cfg.s.rd_dly = 0; /* Sample on falling edge of BOOT_OE */
reg_cfg.s.sam = 0; /* Don't combine write and output enable */
reg_cfg.s.we_ext = 0; /* No write enable extension */
@@ -92,12 +127,12 @@ static void octeon_cf_set_boot_reg_cfg(int cs)
*/
static void octeon_cf_set_piomode(struct ata_port *ap, struct ata_device *dev)
{
- struct octeon_cf_data *ocd = ap->dev->platform_data;
+ struct octeon_cf_port *cf_port = ap->private_data;
union cvmx_mio_boot_reg_timx reg_tim;
- int cs = ocd->base_region;
int T;
struct ata_timing timing;
+ unsigned int div;
int use_iordy;
int trh;
int pause;
@@ -106,7 +141,15 @@ static void octeon_cf_set_piomode(struct ata_port *ap, struct ata_device *dev)
int t2;
int t2i;
- T = (int)(2000000000000LL / octeon_get_clock_rate());
+ /*
+ * A divisor value of four will overflow the timing fields at
+ * clock rates greater than 800MHz
+ */
+ if (octeon_get_io_clock_rate() <= 800000000)
+ div = 4;
+ else
+ div = 8;
+ T = (int)((1000000000000LL * div) / octeon_get_io_clock_rate());
if (ata_timing_compute(dev, dev->pio_mode, &timing, T, T))
BUG();
@@ -121,23 +164,26 @@ static void octeon_cf_set_piomode(struct ata_port *ap, struct ata_device *dev)
if (t2i)
t2i--;
- trh = ns_to_tim_reg(2, 20);
+ trh = ns_to_tim_reg(div, 20);
if (trh)
trh--;
- pause = timing.cycle - timing.active - timing.setup - trh;
+ pause = (int)timing.cycle - (int)timing.active -
+ (int)timing.setup - trh;
+ if (pause < 0)
+ pause = 0;
if (pause)
pause--;
- octeon_cf_set_boot_reg_cfg(cs);
- if (ocd->dma_engine >= 0)
+ octeon_cf_set_boot_reg_cfg(cf_port->cs0, div);
+ if (cf_port->is_true_ide)
/* True IDE mode, program both chip selects. */
- octeon_cf_set_boot_reg_cfg(cs + 1);
+ octeon_cf_set_boot_reg_cfg(cf_port->cs1, div);
use_iordy = ata_pio_need_iordy(dev);
- reg_tim.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_TIMX(cs));
+ reg_tim.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_TIMX(cf_port->cs0));
/* Disable page mode */
reg_tim.s.pagem = 0;
/* Enable dynamic timing */
@@ -161,20 +207,22 @@ static void octeon_cf_set_piomode(struct ata_port *ap, struct ata_device *dev)
/* How long read enable is asserted */
reg_tim.s.oe = t2;
/* Time after CE that read/write starts */
- reg_tim.s.ce = ns_to_tim_reg(2, 5);
+ reg_tim.s.ce = ns_to_tim_reg(div, 5);
/* Time before CE that address is valid */
reg_tim.s.adr = 0;
/* Program the bootbus region timing for the data port chip select. */
- cvmx_write_csr(CVMX_MIO_BOOT_REG_TIMX(cs), reg_tim.u64);
- if (ocd->dma_engine >= 0)
+ cvmx_write_csr(CVMX_MIO_BOOT_REG_TIMX(cf_port->cs0), reg_tim.u64);
+ if (cf_port->is_true_ide)
/* True IDE mode, program both chip selects. */
- cvmx_write_csr(CVMX_MIO_BOOT_REG_TIMX(cs + 1), reg_tim.u64);
+ cvmx_write_csr(CVMX_MIO_BOOT_REG_TIMX(cf_port->cs1),
+ reg_tim.u64);
}
static void octeon_cf_set_dmamode(struct ata_port *ap, struct ata_device *dev)
{
- struct octeon_cf_data *ocd = dev->link->ap->dev->platform_data;
+ struct octeon_cf_port *cf_port = ap->private_data;
+ union cvmx_mio_boot_pin_defs pin_defs;
union cvmx_mio_boot_dma_timx dma_tim;
unsigned int oe_a;
unsigned int oe_n;
@@ -183,6 +231,7 @@ static void octeon_cf_set_dmamode(struct ata_port *ap, struct ata_device *dev)
unsigned int pause;
unsigned int T0, Tkr, Td;
unsigned int tim_mult;
+ int c;
const struct ata_timing *timing;
@@ -199,13 +248,19 @@ static void octeon_cf_set_dmamode(struct ata_port *ap, struct ata_device *dev)
/* not spec'ed, value in eclocks, not affected by tim_mult */
dma_arq = 8;
pause = 25 - dma_arq * 1000 /
- (octeon_get_clock_rate() / 1000000); /* Tz */
+ (octeon_get_io_clock_rate() / 1000000); /* Tz */
oe_a = Td;
/* Tkr from cf spec, lengthened to meet T0 */
oe_n = max(T0 - oe_a, Tkr);
- dma_tim.s.dmack_pi = 1;
+ pin_defs.u64 = cvmx_read_csr(CVMX_MIO_BOOT_PIN_DEFS);
+
+ /* DMA channel number. */
+ c = (cf_port->dma_base & 8) >> 3;
+
+ /* Invert the polarity if the default is 0*/
+ dma_tim.s.dmack_pi = (pin_defs.u64 & (1ull << (11 + c))) ? 0 : 1;
dma_tim.s.oe_n = ns_to_tim_reg(tim_mult, oe_n);
dma_tim.s.oe_a = ns_to_tim_reg(tim_mult, oe_a);
@@ -228,14 +283,11 @@ static void octeon_cf_set_dmamode(struct ata_port *ap, struct ata_device *dev)
pr_debug("ns to ticks (mult %d) of %d is: %d\n", tim_mult, 60,
ns_to_tim_reg(tim_mult, 60));
- pr_debug("oe_n: %d, oe_a: %d, dmack_s: %d, dmack_h: "
- "%d, dmarq: %d, pause: %d\n",
+ pr_debug("oe_n: %d, oe_a: %d, dmack_s: %d, dmack_h: %d, dmarq: %d, pause: %d\n",
dma_tim.s.oe_n, dma_tim.s.oe_a, dma_tim.s.dmack_s,
dma_tim.s.dmack_h, dma_tim.s.dmarq, dma_tim.s.pause);
- cvmx_write_csr(CVMX_MIO_BOOT_DMA_TIMX(ocd->dma_engine),
- dma_tim.u64);
-
+ cvmx_write_csr(cf_port->dma_base + DMA_TIM, dma_tim.u64);
}
/**
@@ -489,15 +541,10 @@ static void octeon_cf_exec_command16(struct ata_port *ap,
ata_wait_idle(ap);
}
-static void octeon_cf_irq_on(struct ata_port *ap)
+static void octeon_cf_ata_port_noaction(struct ata_port *ap)
{
}
-static void octeon_cf_irq_clear(struct ata_port *ap)
-{
- return;
-}
-
static void octeon_cf_dma_setup(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
@@ -519,7 +566,7 @@ static void octeon_cf_dma_setup(struct ata_queued_cmd *qc)
*/
static void octeon_cf_dma_start(struct ata_queued_cmd *qc)
{
- struct octeon_cf_data *ocd = qc->ap->dev->platform_data;
+ struct octeon_cf_port *cf_port = qc->ap->private_data;
union cvmx_mio_boot_dma_cfgx mio_boot_dma_cfg;
union cvmx_mio_boot_dma_intx mio_boot_dma_int;
struct scatterlist *sg;
@@ -535,12 +582,10 @@ static void octeon_cf_dma_start(struct ata_queued_cmd *qc)
*/
mio_boot_dma_int.u64 = 0;
mio_boot_dma_int.s.done = 1;
- cvmx_write_csr(CVMX_MIO_BOOT_DMA_INTX(ocd->dma_engine),
- mio_boot_dma_int.u64);
+ cvmx_write_csr(cf_port->dma_base + DMA_INT, mio_boot_dma_int.u64);
/* Enable the interrupt. */
- cvmx_write_csr(CVMX_MIO_BOOT_DMA_INT_ENX(ocd->dma_engine),
- mio_boot_dma_int.u64);
+ cvmx_write_csr(cf_port->dma_base + DMA_INT_EN, mio_boot_dma_int.u64);
/* Set the direction of the DMA */
mio_boot_dma_cfg.u64 = 0;
@@ -569,8 +614,7 @@ static void octeon_cf_dma_start(struct ata_queued_cmd *qc)
(mio_boot_dma_cfg.s.rw) ? "write" : "read", sg->length,
(void *)(unsigned long)mio_boot_dma_cfg.s.adr);
- cvmx_write_csr(CVMX_MIO_BOOT_DMA_CFGX(ocd->dma_engine),
- mio_boot_dma_cfg.u64);
+ cvmx_write_csr(cf_port->dma_base + DMA_CFG, mio_boot_dma_cfg.u64);
}
/**
@@ -583,10 +627,9 @@ static unsigned int octeon_cf_dma_finished(struct ata_port *ap,
struct ata_queued_cmd *qc)
{
struct ata_eh_info *ehi = &ap->link.eh_info;
- struct octeon_cf_data *ocd = ap->dev->platform_data;
+ struct octeon_cf_port *cf_port = ap->private_data;
union cvmx_mio_boot_dma_cfgx dma_cfg;
union cvmx_mio_boot_dma_intx dma_int;
- struct octeon_cf_port *cf_port;
u8 status;
VPRINTK("ata%u: protocol %d task_state %d\n",
@@ -596,9 +639,7 @@ static unsigned int octeon_cf_dma_finished(struct ata_port *ap,
if (ap->hsm_task_state != HSM_ST_LAST)
return 0;
- cf_port = ap->private_data;
-
- dma_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_DMA_CFGX(ocd->dma_engine));
+ dma_cfg.u64 = cvmx_read_csr(cf_port->dma_base + DMA_CFG);
if (dma_cfg.s.size != 0xfffff) {
/* Error, the transfer was not complete. */
qc->err_mask |= AC_ERR_HOST_BUS;
@@ -608,15 +649,15 @@ static unsigned int octeon_cf_dma_finished(struct ata_port *ap,
/* Stop and clear the dma engine. */
dma_cfg.u64 = 0;
dma_cfg.s.size = -1;
- cvmx_write_csr(CVMX_MIO_BOOT_DMA_CFGX(ocd->dma_engine), dma_cfg.u64);
+ cvmx_write_csr(cf_port->dma_base + DMA_CFG, dma_cfg.u64);
/* Disable the interrupt. */
dma_int.u64 = 0;
- cvmx_write_csr(CVMX_MIO_BOOT_DMA_INT_ENX(ocd->dma_engine), dma_int.u64);
+ cvmx_write_csr(cf_port->dma_base + DMA_INT_EN, dma_int.u64);
/* Clear the DMA complete status */
dma_int.s.done = 1;
- cvmx_write_csr(CVMX_MIO_BOOT_DMA_INTX(ocd->dma_engine), dma_int.u64);
+ cvmx_write_csr(cf_port->dma_base + DMA_INT, dma_int.u64);
status = ap->ops->sff_check_status(ap);
@@ -649,69 +690,68 @@ static irqreturn_t octeon_cf_interrupt(int irq, void *dev_instance)
struct ata_queued_cmd *qc;
union cvmx_mio_boot_dma_intx dma_int;
union cvmx_mio_boot_dma_cfgx dma_cfg;
- struct octeon_cf_data *ocd;
ap = host->ports[i];
- ocd = ap->dev->platform_data;
cf_port = ap->private_data;
- dma_int.u64 =
- cvmx_read_csr(CVMX_MIO_BOOT_DMA_INTX(ocd->dma_engine));
- dma_cfg.u64 =
- cvmx_read_csr(CVMX_MIO_BOOT_DMA_CFGX(ocd->dma_engine));
+
+ dma_int.u64 = cvmx_read_csr(cf_port->dma_base + DMA_INT);
+ dma_cfg.u64 = cvmx_read_csr(cf_port->dma_base + DMA_CFG);
qc = ata_qc_from_tag(ap, ap->link.active_tag);
- if (qc && !(qc->tf.flags & ATA_TFLAG_POLLING)) {
- if (dma_int.s.done && !dma_cfg.s.en) {
- if (!sg_is_last(qc->cursg)) {
- qc->cursg = sg_next(qc->cursg);
- handled = 1;
- octeon_cf_dma_start(qc);
- continue;
- } else {
- cf_port->dma_finished = 1;
- }
- }
- if (!cf_port->dma_finished)
- continue;
- status = ioread8(ap->ioaddr.altstatus_addr);
- if (status & (ATA_BUSY | ATA_DRQ)) {
- /*
- * We are busy, try to handle it
- * later. This is the DMA finished
- * interrupt, and it could take a
- * little while for the card to be
- * ready for more commands.
- */
- /* Clear DMA irq. */
- dma_int.u64 = 0;
- dma_int.s.done = 1;
- cvmx_write_csr(CVMX_MIO_BOOT_DMA_INTX(ocd->dma_engine),
- dma_int.u64);
-
- queue_delayed_work(cf_port->wq,
- &cf_port->delayed_finish, 1);
+ if (!qc || (qc->tf.flags & ATA_TFLAG_POLLING))
+ continue;
+
+ if (dma_int.s.done && !dma_cfg.s.en) {
+ if (!sg_is_last(qc->cursg)) {
+ qc->cursg = sg_next(qc->cursg);
handled = 1;
+ octeon_cf_dma_start(qc);
+ continue;
} else {
- handled |= octeon_cf_dma_finished(ap, qc);
+ cf_port->dma_finished = 1;
}
}
+ if (!cf_port->dma_finished)
+ continue;
+ status = ioread8(ap->ioaddr.altstatus_addr);
+ if (status & (ATA_BUSY | ATA_DRQ)) {
+ /*
+ * We are busy, try to handle it later. This
+ * is the DMA finished interrupt, and it could
+ * take a little while for the card to be
+ * ready for more commands.
+ */
+ /* Clear DMA irq. */
+ dma_int.u64 = 0;
+ dma_int.s.done = 1;
+ cvmx_write_csr(cf_port->dma_base + DMA_INT,
+ dma_int.u64);
+ hrtimer_start_range_ns(&cf_port->delayed_finish,
+ ns_to_ktime(OCTEON_CF_BUSY_POLL_INTERVAL),
+ OCTEON_CF_BUSY_POLL_INTERVAL / 5,
+ HRTIMER_MODE_REL);
+ handled = 1;
+ } else {
+ handled |= octeon_cf_dma_finished(ap, qc);
+ }
}
spin_unlock_irqrestore(&host->lock, flags);
DPRINTK("EXIT\n");
return IRQ_RETVAL(handled);
}
-static void octeon_cf_delayed_finish(struct work_struct *work)
+static enum hrtimer_restart octeon_cf_delayed_finish(struct hrtimer *hrt)
{
- struct octeon_cf_port *cf_port = container_of(work,
+ struct octeon_cf_port *cf_port = container_of(hrt,
struct octeon_cf_port,
- delayed_finish.work);
+ delayed_finish);
struct ata_port *ap = cf_port->ap;
struct ata_host *host = ap->host;
struct ata_queued_cmd *qc;
unsigned long flags;
u8 status;
+ enum hrtimer_restart rv = HRTIMER_NORESTART;
spin_lock_irqsave(&host->lock, flags);
@@ -726,15 +766,17 @@ static void octeon_cf_delayed_finish(struct work_struct *work)
status = ioread8(ap->ioaddr.altstatus_addr);
if (status & (ATA_BUSY | ATA_DRQ)) {
/* Still busy, try again. */
- queue_delayed_work(cf_port->wq,
- &cf_port->delayed_finish, 1);
+ hrtimer_forward_now(hrt,
+ ns_to_ktime(OCTEON_CF_BUSY_POLL_INTERVAL));
+ rv = HRTIMER_RESTART;
goto out;
}
qc = ata_qc_from_tag(ap, ap->link.active_tag);
- if (qc && !(qc->tf.flags & ATA_TFLAG_POLLING))
+ if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
octeon_cf_dma_finished(ap, qc);
out:
spin_unlock_irqrestore(&host->lock, flags);
+ return rv;
}
static void octeon_cf_dev_config(struct ata_device *dev)
@@ -786,8 +828,8 @@ static struct ata_port_operations octeon_cf_ops = {
.qc_prep = ata_noop_qc_prep,
.qc_issue = octeon_cf_qc_issue,
.sff_dev_select = octeon_cf_dev_select,
- .sff_irq_on = octeon_cf_irq_on,
- .sff_irq_clear = octeon_cf_irq_clear,
+ .sff_irq_on = octeon_cf_ata_port_noaction,
+ .sff_irq_clear = octeon_cf_ata_port_noaction,
.cable_detect = ata_cable_40wire,
.set_piomode = octeon_cf_set_piomode,
.set_dmamode = octeon_cf_set_dmamode,
@@ -798,46 +840,113 @@ static int __devinit octeon_cf_probe(struct platform_device *pdev)
{
struct resource *res_cs0, *res_cs1;
+ bool is_16bit;
+ const __be32 *cs_num;
+ struct property *reg_prop;
+ int n_addr, n_size, reg_len;
+ struct device_node *node;
+ const void *prop;
void __iomem *cs0;
void __iomem *cs1 = NULL;
struct ata_host *host;
struct ata_port *ap;
- struct octeon_cf_data *ocd;
int irq = 0;
irq_handler_t irq_handler = NULL;
void __iomem *base;
struct octeon_cf_port *cf_port;
- char version[32];
+ int rv = -ENOMEM;
- res_cs0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res_cs0)
+ node = pdev->dev.of_node;
+ if (node == NULL)
return -EINVAL;
- ocd = pdev->dev.platform_data;
+ cf_port = kzalloc(sizeof(*cf_port), GFP_KERNEL);
+ if (!cf_port)
+ return -ENOMEM;
- cs0 = devm_ioremap_nocache(&pdev->dev, res_cs0->start,
- resource_size(res_cs0));
+ cf_port->is_true_ide = (of_find_property(node, "cavium,true-ide", NULL) != NULL);
- if (!cs0)
- return -ENOMEM;
+ prop = of_get_property(node, "cavium,bus-width", NULL);
+ if (prop)
+ is_16bit = (be32_to_cpup(prop) == 16);
+ else
+ is_16bit = false;
- /* Determine from availability of DMA if True IDE mode or not */
- if (ocd->dma_engine >= 0) {
- res_cs1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!res_cs1)
- return -EINVAL;
+ n_addr = of_n_addr_cells(node);
+ n_size = of_n_size_cells(node);
+ reg_prop = of_find_property(node, "reg", ®_len);
+ if (!reg_prop || reg_len < sizeof(__be32)) {
+ rv = -EINVAL;
+ goto free_cf_port;
+ }
+ cs_num = reg_prop->value;
+ cf_port->cs0 = be32_to_cpup(cs_num);
+
+ if (cf_port->is_true_ide) {
+ struct device_node *dma_node;
+ dma_node = of_parse_phandle(node,
+ "cavium,dma-engine-handle", 0);
+ if (dma_node) {
+ struct platform_device *dma_dev;
+ dma_dev = of_find_device_by_node(dma_node);
+ if (dma_dev) {
+ struct resource *res_dma;
+ int i;
+ res_dma = platform_get_resource(dma_dev, IORESOURCE_MEM, 0);
+ if (!res_dma) {
+ of_node_put(dma_node);
+ rv = -EINVAL;
+ goto free_cf_port;
+ }
+ cf_port->dma_base = (u64)devm_ioremap_nocache(&pdev->dev, res_dma->start,
+ resource_size(res_dma));
+
+ if (!cf_port->dma_base) {
+ of_node_put(dma_node);
+ rv = -EINVAL;
+ goto free_cf_port;
+ }
+
+ irq_handler = octeon_cf_interrupt;
+ i = platform_get_irq(dma_dev, 0);
+ if (i > 0)
+ irq = i;
+ }
+ of_node_put(dma_node);
+ }
+ res_cs1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res_cs1) {
+ rv = -EINVAL;
+ goto free_cf_port;
+ }
cs1 = devm_ioremap_nocache(&pdev->dev, res_cs1->start,
- resource_size(res_cs1));
+ res_cs1->end - res_cs1->start + 1);
if (!cs1)
- return -ENOMEM;
+ goto free_cf_port;
+
+ if (reg_len < (n_addr + n_size + 1) * sizeof(__be32)) {
+ rv = -EINVAL;
+ goto free_cf_port;
+ }
+ cs_num += n_addr + n_size;
+ cf_port->cs1 = be32_to_cpup(cs_num);
}
- cf_port = kzalloc(sizeof(*cf_port), GFP_KERNEL);
- if (!cf_port)
- return -ENOMEM;
+ res_cs0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ if (!res_cs0) {
+ rv = -EINVAL;
+ goto free_cf_port;
+ }
+
+ cs0 = devm_ioremap_nocache(&pdev->dev, res_cs0->start,
+ resource_size(res_cs0));
+
+ if (!cs0)
+ goto free_cf_port;
/* allocate host */
host = ata_host_alloc(&pdev->dev, 1);
@@ -846,21 +955,22 @@ static int __devinit octeon_cf_probe(struct platform_device *pdev)
ap = host->ports[0];
ap->private_data = cf_port;
+ pdev->dev.platform_data = cf_port;
cf_port->ap = ap;
ap->ops = &octeon_cf_ops;
ap->pio_mask = ATA_PIO6;
ap->flags |= ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING;
- base = cs0 + ocd->base_region_bias;
- if (!ocd->is16bit) {
+ if (!is_16bit) {
+ base = cs0 + 0x800;
ap->ioaddr.cmd_addr = base;
ata_sff_std_ports(&ap->ioaddr);
ap->ioaddr.altstatus_addr = base + 0xe;
ap->ioaddr.ctl_addr = base + 0xe;
octeon_cf_ops.sff_data_xfer = octeon_cf_data_xfer8;
- } else if (cs1) {
- /* Presence of cs1 indicates True IDE mode. */
+ } else if (cf_port->is_true_ide) {
+ base = cs0;
ap->ioaddr.cmd_addr = base + (ATA_REG_CMD << 1) + 1;
ap->ioaddr.data_addr = base + (ATA_REG_DATA << 1);
ap->ioaddr.error_addr = base + (ATA_REG_ERR << 1) + 1;
@@ -876,19 +986,15 @@ static int __devinit octeon_cf_probe(struct platform_device *pdev)
ap->ioaddr.ctl_addr = cs1 + (6 << 1) + 1;
octeon_cf_ops.sff_data_xfer = octeon_cf_data_xfer16;
- ap->mwdma_mask = ATA_MWDMA4;
- irq = platform_get_irq(pdev, 0);
- irq_handler = octeon_cf_interrupt;
-
- /* True IDE mode needs delayed work to poll for not-busy. */
- cf_port->wq = create_singlethread_workqueue(DRV_NAME);
- if (!cf_port->wq)
- goto free_cf_port;
- INIT_DELAYED_WORK(&cf_port->delayed_finish,
- octeon_cf_delayed_finish);
+ ap->mwdma_mask = enable_dma ? ATA_MWDMA4 : 0;
+ /* True IDE mode needs a timer to poll for not-busy. */
+ hrtimer_init(&cf_port->delayed_finish, CLOCK_MONOTONIC,
+ HRTIMER_MODE_REL);
+ cf_port->delayed_finish.function = octeon_cf_delayed_finish;
} else {
/* 16 bit but not True IDE */
+ base = cs0 + 0x800;
octeon_cf_ops.sff_data_xfer = octeon_cf_data_xfer16;
octeon_cf_ops.softreset = octeon_cf_softreset16;
octeon_cf_ops.sff_check_status = octeon_cf_check_status16;
@@ -902,28 +1008,71 @@ static int __devinit octeon_cf_probe(struct platform_device *pdev)
ap->ioaddr.ctl_addr = base + 0xe;
ap->ioaddr.altstatus_addr = base + 0xe;
}
+ cf_port->c0 = ap->ioaddr.ctl_addr;
+
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
+ pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
ata_port_desc(ap, "cmd %p ctl %p", base, ap->ioaddr.ctl_addr);
- snprintf(version, sizeof(version), "%s %d bit%s",
- DRV_VERSION,
- (ocd->is16bit) ? 16 : 8,
- (cs1) ? ", True IDE" : "");
- ata_print_version_once(&pdev->dev, version);
+ dev_info(&pdev->dev, "version " DRV_VERSION" %d bit%s.\n",
+ is_16bit ? 16 : 8,
+ cf_port->is_true_ide ? ", True IDE" : "");
- return ata_host_activate(host, irq, irq_handler, 0, &octeon_cf_sht);
+ return ata_host_activate(host, irq, irq_handler,
+ IRQF_SHARED, &octeon_cf_sht);
free_cf_port:
kfree(cf_port);
- return -ENOMEM;
+ return rv;
+}
+
+static void octeon_cf_shutdown(struct device *dev)
+{
+ union cvmx_mio_boot_dma_cfgx dma_cfg;
+ union cvmx_mio_boot_dma_intx dma_int;
+
+ struct octeon_cf_port *cf_port = dev->platform_data;
+
+ if (cf_port->dma_base) {
+ /* Stop and clear the dma engine. */
+ dma_cfg.u64 = 0;
+ dma_cfg.s.size = -1;
+ cvmx_write_csr(cf_port->dma_base + DMA_CFG, dma_cfg.u64);
+
+ /* Disable the interrupt. */
+ dma_int.u64 = 0;
+ cvmx_write_csr(cf_port->dma_base + DMA_INT_EN, dma_int.u64);
+
+ /* Clear the DMA complete status */
+ dma_int.s.done = 1;
+ cvmx_write_csr(cf_port->dma_base + DMA_INT, dma_int.u64);
+
+ __raw_writeb(0, cf_port->c0);
+ udelay(20);
+ __raw_writeb(ATA_SRST, cf_port->c0);
+ udelay(20);
+ __raw_writeb(0, cf_port->c0);
+ mdelay(100);
+ }
}
+static struct of_device_id octeon_cf_match[] = {
+ {
+ .compatible = "cavium,ebt3000-compact-flash",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, octeon_i2c_match);
+
static struct platform_driver octeon_cf_driver = {
.probe = octeon_cf_probe,
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
+ .of_match_table = octeon_cf_match,
+ .shutdown = octeon_cf_shutdown
},
};
--
1.7.11.2
--
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