diff options
author | John(Jung-Ik) Lee <jilee@google.com> | 2009-09-15 04:32:33 (GMT) |
---|---|---|
committer | Jeff Garzik <jgarzik@redhat.com> | 2009-09-17 20:47:06 (GMT) |
commit | d15d6e6cc340566d53d953ffdec2c9e96816fa52 (patch) | |
tree | 8b2052455ef7daca721e55c793216e5f54f6d08d /drivers/ata/pata_atp867x.c | |
parent | 90950a2504b66d626a73f55ca949a2e79ff4b7c4 (diff) | |
download | linux-fsl-qoriq-d15d6e6cc340566d53d953ffdec2c9e96816fa52.tar.xz |
libata: Add pata_atp867x driver for Artop/Acard ATP867X controllers
This is a new pata driver for ARTOP 867X 64bit 4-channel UDMA133 ATA ctrls.
Based on the Atp867 data sheet rev 1.2, Acard, and in part on early ide codes
from Eric Uhrhane <ericu@google.com>.
Signed-off-by: John(Jung-Ik) Lee <jilee@google.com>
Reviewed-by: Grant Grundler <grundler@google.com>
Reviewed-by: Gwendal Gringo <gwendal@google.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/pata_atp867x.c')
-rw-r--r-- | drivers/ata/pata_atp867x.c | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/drivers/ata/pata_atp867x.c b/drivers/ata/pata_atp867x.c new file mode 100644 index 0000000..7990de9 --- /dev/null +++ b/drivers/ata/pata_atp867x.c @@ -0,0 +1,548 @@ +/* + * pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver + * + * (C) 2009 Google Inc. John(Jung-Ik) Lee <jilee@google.com> + * + * Per Atp867 data sheet rev 1.2, Acard. + * Based in part on early ide code from + * 2003-2004 by Eric Uhrhane, Google, Inc. + * + * 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 + * + * + * TODO: + * 1. RAID features [comparison, XOR, striping, mirroring, etc.] + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/blkdev.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <scsi/scsi_host.h> +#include <linux/libata.h> + +#define DRV_NAME "pata_atp867x" +#define DRV_VERSION "0.7.5" + +/* + * IO Registers + * Note that all runtime hot priv ports are cached in ap private_data + */ + +enum { + ATP867X_IO_CHANNEL_OFFSET = 0x10, + + /* + * IO Register Bitfields + */ + + ATP867X_IO_PIOSPD_ACTIVE_SHIFT = 4, + ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0, + + ATP867X_IO_DMAMODE_MSTR_SHIFT = 0, + ATP867X_IO_DMAMODE_MSTR_MASK = 0x07, + ATP867X_IO_DMAMODE_SLAVE_SHIFT = 4, + ATP867X_IO_DMAMODE_SLAVE_MASK = 0x70, + + ATP867X_IO_DMAMODE_UDMA_6 = 0x07, + ATP867X_IO_DMAMODE_UDMA_5 = 0x06, + ATP867X_IO_DMAMODE_UDMA_4 = 0x05, + ATP867X_IO_DMAMODE_UDMA_3 = 0x04, + ATP867X_IO_DMAMODE_UDMA_2 = 0x03, + ATP867X_IO_DMAMODE_UDMA_1 = 0x02, + ATP867X_IO_DMAMODE_UDMA_0 = 0x01, + ATP867X_IO_DMAMODE_DISABLE = 0x00, + + ATP867X_IO_SYS_INFO_66MHZ = 0x04, + ATP867X_IO_SYS_INFO_SLOW_UDMA5 = 0x02, + ATP867X_IO_SYS_MASK_RESERVED = (~0xf1), + + ATP867X_IO_PORTSPD_VAL = 0x1143, + ATP867X_PREREAD_VAL = 0x0200, + + ATP867X_NUM_PORTS = 4, + ATP867X_BAR_IOBASE = 0, + ATP867X_BAR_ROMBASE = 6, +}; + +#define ATP867X_IOBASE(ap) ((ap)->host->iomap[0]) +#define ATP867X_SYS_INFO(ap) (0x3F + ATP867X_IOBASE(ap)) + +#define ATP867X_IO_PORTBASE(ap, port) (0x00 + ATP867X_IOBASE(ap) + \ + (port) * ATP867X_IO_CHANNEL_OFFSET) +#define ATP867X_IO_DMABASE(ap, port) (0x40 + \ + ATP867X_IO_PORTBASE((ap), (port))) + +#define ATP867X_IO_STATUS(ap, port) (0x07 + \ + ATP867X_IO_PORTBASE((ap), (port))) +#define ATP867X_IO_ALTSTATUS(ap, port) (0x0E + \ + ATP867X_IO_PORTBASE((ap), (port))) + +/* + * hot priv ports + */ +#define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \ + ATP867X_IO_DMABASE((ap), (port))) +#define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \ + ATP867X_IO_DMABASE((ap), (port))) +#define ATP867X_IO_8BPIOSPD(ap, port) (0x0A + \ + ATP867X_IO_DMABASE((ap), (port))) +#define ATP867X_IO_DMAMODE(ap, port) (0x0B + \ + ATP867X_IO_DMABASE((ap), (port))) + +#define ATP867X_IO_PORTSPD(ap, port) (0x4A + \ + ATP867X_IO_PORTBASE((ap), (port))) +#define ATP867X_IO_PREREAD(ap, port) (0x4C + \ + ATP867X_IO_PORTBASE((ap), (port))) + +struct atp867x_priv { + void __iomem *dma_mode; + void __iomem *mstr_piospd; + void __iomem *slave_piospd; + void __iomem *eightb_piospd; + int pci66mhz; +}; + +static inline u8 atp867x_speed_to_mode(u8 speed) +{ + return speed - XFER_UDMA_0 + 1; +} + +static void atp867x_set_dmamode(struct ata_port *ap, struct ata_device *adev) +{ + struct pci_dev *pdev = to_pci_dev(ap->host->dev); + struct atp867x_priv *dp = ap->private_data; + u8 speed = adev->dma_mode; + u8 b; + u8 mode; + + mode = atp867x_speed_to_mode(speed); + + /* + * Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed + * on 66MHz bus + * rev-A: UDMA_1~4 (5, 6 no change) + * rev-B: all UDMA modes + * UDMA_0 stays not to disable UDMA + */ + if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0 && + (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B || + mode < ATP867X_IO_DMAMODE_UDMA_5)) + mode--; + + b = ioread8(dp->dma_mode); + if (adev->devno & 1) { + b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) | + (mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT); + } else { + b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) | + (mode << ATP867X_IO_DMAMODE_MSTR_SHIFT); + } + iowrite8(b, dp->dma_mode); +} + +static int atp867x_get_active_clocks_shifted(unsigned int clk) +{ + unsigned char clocks = clk; + + switch (clocks) { + case 0: + clocks = 1; + break; + case 1 ... 7: + break; + case 8 ... 12: + clocks = 7; + break; + default: + printk(KERN_WARNING "ATP867X: active %dclk is invalid. " + "Using default 8clk.\n", clk); + clocks = 0; /* 8 clk */ + break; + } + return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT; +} + +static int atp867x_get_recover_clocks_shifted(unsigned int clk) +{ + unsigned char clocks = clk; + + switch (clocks) { + case 0: + clocks = 1; + break; + case 1 ... 11: + break; + case 12: + clocks = 0; + break; + case 13: case 14: + --clocks; + break; + case 15: + break; + default: + printk(KERN_WARNING "ATP867X: recover %dclk is invalid. " + "Using default 15clk.\n", clk); + clocks = 0; /* 12 clk */ + break; + } + return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT; +} + +static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev) +{ + struct ata_device *peer = ata_dev_pair(adev); + struct atp867x_priv *dp = ap->private_data; + u8 speed = adev->pio_mode; + struct ata_timing t, p; + int T, UT; + u8 b; + + T = 1000000000 / 33333; + UT = T / 4; + + ata_timing_compute(adev, speed, &t, T, UT); + if (peer && peer->pio_mode) { + ata_timing_compute(peer, peer->pio_mode, &p, T, UT); + ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT); + } + + b = ioread8(dp->dma_mode); + if (adev->devno & 1) + b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK); + else + b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK); + iowrite8(b, dp->dma_mode); + + b = atp867x_get_active_clocks_shifted(t.active) | + atp867x_get_recover_clocks_shifted(t.recover); + if (dp->pci66mhz) + b += 0x10; + + if (adev->devno & 1) + iowrite8(b, dp->slave_piospd); + else + iowrite8(b, dp->mstr_piospd); + + /* + * use the same value for comand timing as for PIO timimg + */ + iowrite8(b, dp->eightb_piospd); +} + +static int atp867x_cable_detect(struct ata_port *ap) +{ + return ATA_CBL_PATA40_SHORT; +} + +static struct scsi_host_template atp867x_sht = { + ATA_BMDMA_SHT(DRV_NAME), +}; + +static struct ata_port_operations atp867x_ops = { + .inherits = &ata_bmdma_port_ops, + .cable_detect = atp867x_cable_detect, + .set_piomode = atp867x_set_piomode, + .set_dmamode = atp867x_set_dmamode, +}; + + +#ifdef ATP867X_DEBUG +static void atp867x_check_res(struct pci_dev *pdev) +{ + int i; + unsigned long start, len; + + /* Check the PCI resources for this channel are enabled */ + for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { + start = pci_resource_start(pdev, i); + len = pci_resource_len(pdev, i); + printk(KERN_DEBUG "ATP867X: resource start:len=%lx:%lx\n", + start, len); + } +} + +static void atp867x_check_ports(struct ata_port *ap, int port) +{ + struct ata_ioports *ioaddr = &ap->ioaddr; + struct atp867x_priv *dp = ap->private_data; + + printk(KERN_DEBUG "ATP867X: port[%d] addresses\n" + " cmd_addr =0x%llx, 0x%llx\n" + " ctl_addr =0x%llx, 0x%llx\n" + " bmdma_addr =0x%llx, 0x%llx\n" + " data_addr =0x%llx\n" + " error_addr =0x%llx\n" + " feature_addr =0x%llx\n" + " nsect_addr =0x%llx\n" + " lbal_addr =0x%llx\n" + " lbam_addr =0x%llx\n" + " lbah_addr =0x%llx\n" + " device_addr =0x%llx\n" + " status_addr =0x%llx\n" + " command_addr =0x%llx\n" + " dp->dma_mode =0x%llx\n" + " dp->mstr_piospd =0x%llx\n" + " dp->slave_piospd =0x%llx\n" + " dp->eightb_piospd =0x%llx\n" + " dp->pci66mhz =0x%lx\n", + port, + (unsigned long long)ioaddr->cmd_addr, + (unsigned long long)ATP867X_IO_PORTBASE(ap, port), + (unsigned long long)ioaddr->ctl_addr, + (unsigned long long)ATP867X_IO_ALTSTATUS(ap, port), + (unsigned long long)ioaddr->bmdma_addr, + (unsigned long long)ATP867X_IO_DMABASE(ap, port), + (unsigned long long)ioaddr->data_addr, + (unsigned long long)ioaddr->error_addr, + (unsigned long long)ioaddr->feature_addr, + (unsigned long long)ioaddr->nsect_addr, + (unsigned long long)ioaddr->lbal_addr, + (unsigned long long)ioaddr->lbam_addr, + (unsigned long long)ioaddr->lbah_addr, + (unsigned long long)ioaddr->device_addr, + (unsigned long long)ioaddr->status_addr, + (unsigned long long)ioaddr->command_addr, + (unsigned long long)dp->dma_mode, + (unsigned long long)dp->mstr_piospd, + (unsigned long long)dp->slave_piospd, + (unsigned long long)dp->eightb_piospd, + (unsigned long)dp->pci66mhz); +} +#endif + +static int atp867x_set_priv(struct ata_port *ap) +{ + struct pci_dev *pdev = to_pci_dev(ap->host->dev); + struct atp867x_priv *dp; + int port = ap->port_no; + + dp = ap->private_data = + devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL); + if (dp == NULL) + return -ENOMEM; + + dp->dma_mode = ATP867X_IO_DMAMODE(ap, port); + dp->mstr_piospd = ATP867X_IO_MSTRPIOSPD(ap, port); + dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port); + dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port); + + dp->pci66mhz = + ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ; + + return 0; +} + +static void atp867x_fixup(struct ata_host *host) +{ + struct pci_dev *pdev = to_pci_dev(host->dev); + struct ata_port *ap = host->ports[0]; + int i; + u8 v; + + /* + * Broken BIOS might not set latency high enough + */ + pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v); + if (v < 0x80) { + v = 0x80; + pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v); + printk(KERN_DEBUG "ATP867X: set latency timer of device %s" + " to %d\n", pci_name(pdev), v); + } + + /* + * init 8bit io ports speed(0aaarrrr) to 43h and + * init udma modes of master/slave to 0/0(11h) + */ + for (i = 0; i < ATP867X_NUM_PORTS; i++) + iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i)); + + /* + * init PreREAD counts + */ + for (i = 0; i < ATP867X_NUM_PORTS; i++) + iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i)); + + v = ioread8(ATP867X_IOBASE(ap) + 0x28); + v &= 0xcf; /* Enable INTA#: bit4=0 means enable */ + v |= 0xc0; /* Enable PCI burst, MRM & not immediate interrupts */ + iowrite8(v, ATP867X_IOBASE(ap) + 0x28); + + /* + * Turn off the over clocked udma5 mode, only for Rev-B + */ + v = ioread8(ATP867X_SYS_INFO(ap)); + v &= ATP867X_IO_SYS_MASK_RESERVED; + if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B) + v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5; + iowrite8(v, ATP867X_SYS_INFO(ap)); +} + +static int atp867x_ata_pci_sff_init_host(struct ata_host *host) +{ + struct device *gdev = host->dev; + struct pci_dev *pdev = to_pci_dev(gdev); + unsigned int mask = 0; + int i, rc; + + /* + * do not map rombase + */ + rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME); + if (rc == -EBUSY) + pcim_pin_device(pdev); + if (rc) + return rc; + host->iomap = pcim_iomap_table(pdev); + +#ifdef ATP867X_DEBUG + atp867x_check_res(pdev); + + for (i = 0; i < PCI_ROM_RESOURCE; i++) + printk(KERN_DEBUG "ATP867X: iomap[%d]=0x%llx\n", i, + (unsigned long long)(host->iomap[i])); +#endif + + /* + * request, iomap BARs and init port addresses accordingly + */ + for (i = 0; i < host->n_ports; i++) { + struct ata_port *ap = host->ports[i]; + struct ata_ioports *ioaddr = &ap->ioaddr; + + ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i); + ioaddr->ctl_addr = ioaddr->altstatus_addr + = ATP867X_IO_ALTSTATUS(ap, i); + ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i); + + ata_sff_std_ports(ioaddr); + rc = atp867x_set_priv(ap); + if (rc) + return rc; + +#ifdef ATP867X_DEBUG + atp867x_check_ports(ap, i); +#endif + ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", + (unsigned long)ioaddr->cmd_addr, + (unsigned long)ioaddr->ctl_addr); + ata_port_desc(ap, "bmdma 0x%lx", + (unsigned long)ioaddr->bmdma_addr); + + mask |= 1 << i; + } + + if (!mask) { + dev_printk(KERN_ERR, gdev, "no available native port\n"); + return -ENODEV; + } + + atp867x_fixup(host); + + rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); + if (rc) + return rc; + + rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); + return rc; +} + +static int atp867x_init_one(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + static int printed_version; + static const struct ata_port_info info_867x = { + .flags = ATA_FLAG_SLAVE_POSS, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + .port_ops = &atp867x_ops, + }; + + struct ata_host *host; + const struct ata_port_info *ppi[] = { &info_867x, NULL }; + int rc; + + if (!printed_version++) + dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n"); + + rc = pcim_enable_device(pdev); + if (rc) + return rc; + + printk(KERN_INFO "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)", + pdev->device); + + host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS); + if (!host) { + dev_printk(KERN_ERR, &pdev->dev, + "failed to allocate ATA host\n"); + rc = -ENOMEM; + goto err_out; + } + + rc = atp867x_ata_pci_sff_init_host(host); + if (rc) { + dev_printk(KERN_ERR, &pdev->dev, "failed to init host\n"); + goto err_out; + } + + pci_set_master(pdev); + + rc = ata_host_activate(host, pdev->irq, ata_sff_interrupt, + IRQF_SHARED, &atp867x_sht); + if (rc) + dev_printk(KERN_ERR, &pdev->dev, "failed to activate host\n"); + +err_out: + return rc; +} + +static struct pci_device_id atp867x_pci_tbl[] = { + { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A), 0 }, + { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B), 0 }, + { }, +}; + +static struct pci_driver atp867x_driver = { + .name = DRV_NAME, + .id_table = atp867x_pci_tbl, + .probe = atp867x_init_one, + .remove = ata_pci_remove_one, +}; + +static int __init atp867x_init(void) +{ + return pci_register_driver(&atp867x_driver); +} + +static void __exit atp867x_exit(void) +{ + pci_unregister_driver(&atp867x_driver); +} + +MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc."); +MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl); +MODULE_VERSION(DRV_VERSION); + +module_init(atp867x_init); +module_exit(atp867x_exit); |