[PATCH 2/3] x86: Add support for IDE on the legacy I/O ports
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Fri Apr 4 20:11:20 PDT 2014
On 12:12 Tue 25 Mar , Michel Stam wrote:
>
> ---
> arch/x86/boards/x86_generic/generic_pc.c | 71 ++++++++++++++++++++++++
> drivers/ata/ide-sff.c | 94
> ++++++++++++++++++++++++++------
> drivers/ata/intf_platform_ide.c | 14 ++++-
> include/ata_drive.h | 1 +
> 4 files changed, 161 insertions(+), 19 deletions(-)
>
> diff --git a/arch/x86/boards/x86_generic/generic_pc.c
> b/arch/x86/boards/x86_generic/generic_pc.c
> index 74a7224..6152afc 100644
> --- a/arch/x86/boards/x86_generic/generic_pc.c
> +++ b/arch/x86/boards/x86_generic/generic_pc.c
> @@ -27,6 +27,10 @@
> #include <ns16550.h>
> #include <linux/err.h>
> +#ifdef CONFIG_DISK_INTF_PLATFORM_IDE
why the ifdef?
> +#include <platform_ide.h>
> +#endif
> +
> /*
> * These datas are from the MBR, created by the linker and filled by the
> * setup tool while installing barebox on the disk drive
> @@ -41,6 +45,55 @@ extern uint8_t pers_env_drive;
> */
> #define PATCH_AREA_PERS_SIZE_UNUSED 0x000
> +#ifdef CONFIG_DISK_INTF_PLATFORM_IDE
> +
> +static struct ide_port_info ide_plat = {
> + .ioport_shift = 0,
> + .dataif_be = 0,
> +};
> +
> +static struct resource primary_ide_resources[] = {
> + {
> + .name = "base",
> + .start = 0x1f0,
> + .end = 0x1f8,
> + .flags = IORESOURCE_IO
> + },
> + {
> + .name = "alt",
> + .start = 0x3f6,
> + w .end = 0x3f8,
> + .flags = IORESOURCE_IO
> + }
> +};
> +
> +static struct resource secondary_ide_resources[] = {
> + {
> + .name = "base",
> + .start = 0x170,
> + .end = 0x177,
> + .flags = IORESOURCE_IO
> + },
> +};
> +
> +static struct device_d primary_ide_device = {
> + .name = "ide_intf",
> + .id = 0,
> + .platform_data = &ide_plat,
> + .resource = primary_ide_resources,
> + .num_resources = ARRAY_SIZE( primary_ide_resources ),
> +};
> +
> +static struct device_d secondary_ide_device = {
> + .name = "ide_intf",
> + .id = 1,
> + .platform_data = &ide_plat,
> + .resource = secondary_ide_resources,
> + .num_resources = ARRAY_SIZE( secondary_ide_resources ),
> +};
please create the device on the fly
> +
> +#endif /* CONFIG_DISK_INTF_PLATFORM_IDE */
> +
> static int devices_init(void)
> {
> struct cdev *cdev;
> @@ -48,9 +101,26 @@ static int devices_init(void)
> /* extended memory only */
> add_mem_device("ram0", 0x0, bios_get_memsize() << 10,
> IORESOURCE_MEM_WRITEABLE);
> +#ifdef CONFIG_DISK_BIOS
if (IS_ENABLED(CONFxx))
> add_generic_device("biosdrive", DEVICE_ID_DYNAMIC, NULL, 0, 0,
> IORESOURCE_MEM,
> NULL);
> +#endif
> +
> +#ifdef CONFIG_DISK_INTF_PLATFORM_IDE
ditto and no space after ( and before )
> + platform_device_register( &primary_ide_device );
> + platform_device_register( &secondary_ide_device );
> +
> + if (pers_env_size != PATCH_AREA_PERS_SIZE_UNUSED) {
> + cdev = devfs_add_partition("ata0",
> + pers_env_storage * 512,
> + (unsigned)pers_env_size * 512,
> + DEVFS_PARTITION_FIXED, "env0");
> + printf("Partition: %ld\n", IS_ERR(cdev) ? PTR_ERR(cdev) : 0);
> + } else
> + printf("No persistent storage defined\n");
> +#endif /* CONFIG_DISK_INTF_PLATFORM_IDE */
> +#ifdef CONFIG_DISK_BIOS
> if (pers_env_size != PATCH_AREA_PERS_SIZE_UNUSED) {
> cdev = devfs_add_partition("biosdisk0",
> pers_env_storage * 512,
> @@ -59,6 +129,7 @@ static int devices_init(void)
> printf("Partition: %ld\n", IS_ERR(cdev) ? PTR_ERR(cdev) : 0);
> } else
> printf("No persistent storage defined\n");
> +#endif
> return 0;
> }
> diff --git a/drivers/ata/ide-sff.c b/drivers/ata/ide-sff.c
> index 3d5932e..809a129 100644
> --- a/drivers/ata/ide-sff.c
> +++ b/drivers/ata/ide-sff.c
> @@ -15,13 +15,71 @@
> #define DISK_SLAVE 1
> /**
> + * Read a byte from the ATA controller
> + * @param ide IDE port structure
> + * @param addr Register adress
> + * @return Register's content
> + */
> +static inline uint8_t ata_rd_byte(struct ide_port *ide, void
> __iomem *addr )
> +{
> + if (!ide->io.mmio)
> + return (uint8_t) inb((int) addr);
> + else
> + return readb(addr);
> +}
> +
> +/**
> + * Write a byte to the ATA controller
> + * @param ide IDE port structure
> + * @param value Value to write
> + * @param addr Register adress
> + * @return Register's content
> + */
> +static inline void ata_wr_byte(struct ide_port *ide, uint8_t value,
> void __iomem *addr )
> +{
> + if (!ide->io.mmio)
> + outb(value, (int) addr);
> + else
> + writeb(value,addr);
> +}
> +
> +/**
> + * Read a word from the ATA controller
> + * @param ide IDE port structure
> + * @param addr Register adress
> + * @return Register's content
> + */
> +static inline uint16_t ata_rd_word(struct ide_port *ide, void
> __iomem *addr )
> +{
> + if (!ide->io.mmio)
> + return (uint16_t) inw((int) addr);
> + else
> + return readw(addr);
> +}
> +
> +/**
> + * Write a word to the ATA controller
> + * @param ide IDE port structure
> + * @param value Value to write
> + * @param addr Register adress
> + * @return Register's content
> + */
> +static inline void ata_wr_word(struct ide_port *ide, uint16_t
> value, void __iomem *addr )
> +{
> + if (!ide->io.mmio)
> + outw(value, (int) addr);
> + else
> + writew(value,addr);
> +}
> +
> +/**
> * Read the status register of the ATA drive
> * @param io Register file
> * @return Register's content
> */
> static uint8_t ata_rd_status(struct ide_port *ide)
> {
> - return readb(ide->io.status_addr);
> + return ata_rd_byte(ide,ide->io.status_addr);
> }
> /**
> @@ -83,12 +141,12 @@ static int ata_set_lba_sector(struct ide_port
> *ide, unsigned drive, uint64_t num
> if (num > 0x0FFFFFFF || drive > 1)
> return -EINVAL;
> - writeb(0xA0 | LBA_FLAG | drive << 4 | num >> 24, ide->io.device_addr);
> - writeb(0x00, ide->io.error_addr);
> - writeb(0x01, ide->io.nsect_addr);
> - writeb(num, ide->io.lbal_addr); /* 0 ... 7 */
> - writeb(num >> 8, ide->io.lbam_addr); /* 8 ... 15 */
> - writeb(num >> 16, ide->io.lbah_addr); /* 16 ... 23 */
> + ata_wr_byte(ide, 0xA0 | LBA_FLAG | drive << 4 | num >> 24,
> ide->io.device_addr);
> + ata_wr_byte(ide, 0x00, ide->io.error_addr);
> + ata_wr_byte(ide, 0x01, ide->io.nsect_addr);
> + ata_wr_byte(ide, num, ide->io.lbal_addr); /* 0 ... 7 */
> + ata_wr_byte(ide, num >> 8, ide->io.lbam_addr); /* 8 ... 15 */
> + ata_wr_byte(ide, num >> 16, ide->io.lbah_addr); /* 16 ... 23 */
> return 0;
> }
> @@ -107,7 +165,7 @@ static int ata_wr_cmd(struct ide_port *ide, uint8_t cmd)
> if (rc != 0)
> return rc;
> - writeb(cmd, ide->io.command_addr);
> + ata_wr_byte(ide, cmd, ide->io.command_addr);
> return 0;
> }
> @@ -118,7 +176,7 @@ static int ata_wr_cmd(struct ide_port *ide,
> uint8_t cmd)
> */
> static void ata_wr_dev_ctrl(struct ide_port *ide, uint8_t val)
> {
> - writeb(val, ide->io.ctl_addr);
> + ata_wr_byte(ide, val, ide->io.ctl_addr);
> }
> /**
> @@ -133,10 +191,10 @@ static void ata_rd_sector(struct ide_port
> *ide, void *buf)
> if (ide->io.dataif_be) {
> for (; u > 0; u--)
> - *b++ = be16_to_cpu(readw(ide->io.data_addr));
> + *b++ = be16_to_cpu(ata_rd_word(ide, ide->io.data_addr));
> } else {
> for (; u > 0; u--)
> - *b++ = le16_to_cpu(readw(ide->io.data_addr));
> + *b++ = le16_to_cpu(ata_rd_word(ide, ide->io.data_addr));
> }
> }
> @@ -152,10 +210,10 @@ static void ata_wr_sector(struct ide_port
> *ide, const void *buf)
> if (ide->io.dataif_be) {
> for (; u > 0; u--)
> - writew(cpu_to_be16(*b++), ide->io.data_addr);
> + ata_wr_word(ide, cpu_to_be16(*b++), ide->io.data_addr);
> } else {
> for (; u > 0; u--)
> - writew(cpu_to_le16(*b++), ide->io.data_addr);
> + ata_wr_word(ide, cpu_to_le16(*b++), ide->io.data_addr);
> }
> }
> @@ -169,10 +227,10 @@ static int ide_read_id(struct ata_port *port,
> void *buf)
> struct ide_port *ide = to_ata_drive_access(port);
> int rc;
> - writeb(0xA0, ide->io.device_addr); /* FIXME drive */
> - writeb(0x00, ide->io.lbal_addr);
> - writeb(0x00, ide->io.lbam_addr);
> - writeb(0x00, ide->io.lbah_addr);
> + ata_wr_byte(ide, 0xA0, ide->io.device_addr); /* FIXME drive */
> + ata_wr_byte(ide, 0x00, ide->io.lbal_addr);
> + ata_wr_byte(ide, 0x00, ide->io.lbam_addr);
> + ata_wr_byte(ide, 0x00, ide->io.lbah_addr);
> rc = ata_wr_cmd(ide, ATA_CMD_ID_ATA);
> if (rc != 0)
> @@ -327,6 +385,8 @@ int ide_port_register(struct ide_port *ide)
> ide->port.ops = &ide_ops;
> ret = ata_port_register(&ide->port);
> + if ( !ret )
> + ata_port_detect(&ide->port);
> if (ret)
> free(ide);
> diff --git a/drivers/ata/intf_platform_ide.c
> b/drivers/ata/intf_platform_ide.c
> index 8ae0f05..24f78f4 100644
> --- a/drivers/ata/intf_platform_ide.c
> +++ b/drivers/ata/intf_platform_ide.c
> @@ -89,8 +89,18 @@ static int platform_ide_probe(struct device_d *dev)
> }
> ide = xzalloc(sizeof(*ide));
> - reg_base = dev_request_mem_region(dev, 0);
> - alt_base = dev_request_mem_region(dev, 1);
> + reg_base = dev_request_region(dev, 0, IORESOURCE_MEM);
please check your coding style
> + if (reg_base != NULL)
> + {
> + alt_base = dev_request_region(dev, 1, IORESOURCE_MEM);
> + ide->io.mmio = 1;
> + }
> + else
> + {
> + reg_base = dev_request_region(dev, 0, IORESOURCE_IO);
> + alt_base = dev_request_region(dev, 1, IORESOURCE_IO);
> + }
> +
> platform_ide_setup_port(reg_base, alt_base, &ide->io,
> pdata->ioport_shift);
> ide->io.reset = pdata->reset;
> ide->io.dataif_be = pdata->dataif_be;
> diff --git a/include/ata_drive.h b/include/ata_drive.h
> index 6d6cca4..44073cb 100644
> --- a/include/ata_drive.h
> +++ b/include/ata_drive.h
> @@ -119,6 +119,7 @@ struct ata_ioports {
> /* hard reset line handling */
> void (*reset)(int); /* true: assert reset, false: de-assert reset */
> int dataif_be; /* true if 16 bit data register is big endian */
> + int mmio; /* true if memory-mapped io */
so use a boolean
> };
> struct ata_port;
> --
> 1.8.4
>
>
> _______________________________________________
> barebox mailing list
> barebox at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
More information about the barebox
mailing list