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author | Thomas Bogendoerfer <tbogendoerfer@suse.de> | 2020-01-09 11:34:29 +0100 |
---|---|---|
committer | Paul Burton <paulburton@kernel.org> | 2020-01-09 15:30:59 -0800 |
commit | 0ce5ebd24d25f02c73940f047b12733d84b125e8 (patch) | |
tree | 3cbdc0a8e8baff23e120b7b8ffdf1ded8e5c8a1d /drivers/mfd | |
parent | 10cf8300ecada10f4bd6c9be78439cce98ae6d8b (diff) | |
download | linux-0ce5ebd24d25f02c73940f047b12733d84b125e8.tar.gz linux-0ce5ebd24d25f02c73940f047b12733d84b125e8.tar.bz2 linux-0ce5ebd24d25f02c73940f047b12733d84b125e8.zip |
mfd: ioc3: Add driver for SGI IOC3 chip
SGI IOC3 chip has integrated ethernet, keyboard and mouse interface.
It also supports connecting a SuperIO chip for serial and parallel
interfaces. IOC3 is used inside various SGI systemboards and add-on
cards with different equipped external interfaces.
Support for ethernet and serial interfaces were implemented inside
the network driver. This patchset moves out the not network related
parts to a new MFD driver, which takes care of card detection,
setup of platform devices and interrupt distribution for the subdevices.
Serial portion: Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
Network part: Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Network part: Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-serial@vger.kernel.org
Diffstat (limited to 'drivers/mfd')
-rw-r--r-- | drivers/mfd/Kconfig | 13 | ||||
-rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
-rw-r--r-- | drivers/mfd/ioc3.c | 669 |
3 files changed, 683 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 420900852166..7a4a41dddc97 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2004,5 +2004,18 @@ config RAVE_SP_CORE Select this to get support for the Supervisory Processor device found on several devices in RAVE line of hardware. +config SGI_MFD_IOC3 + tristate "SGI IOC3 core driver" + depends on PCI && MIPS && 64BIT + select MFD_CORE + help + This option enables basic support for the SGI IOC3-based + controller cards. This option does not enable any specific + functions on such a card, but provides necessary infrastructure + for other drivers to utilize. + + If you have an SGI Origin, Octane, or a PCI IOC3 card, + then say Y. Otherwise say N. + endmenu endif diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index aed99f08739f..5fe930c76ade 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -255,3 +255,4 @@ obj-$(CONFIG_MFD_ROHM_BD70528) += rohm-bd70528.o obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o obj-$(CONFIG_MFD_STMFX) += stmfx.o +obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o diff --git a/drivers/mfd/ioc3.c b/drivers/mfd/ioc3.c new file mode 100644 index 000000000000..02998d4eb74b --- /dev/null +++ b/drivers/mfd/ioc3.c @@ -0,0 +1,669 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SGI IOC3 multifunction device driver + * + * Copyright (C) 2018, 2019 Thomas Bogendoerfer <tbogendoerfer@suse.de> + * + * Based on work by: + * Stanislaw Skowronek <skylark@unaligned.org> + * Joshua Kinard <kumba@gentoo.org> + * Brent Casavant <bcasavan@sgi.com> - IOC4 master driver + * Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer + */ + +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/platform_device.h> +#include <linux/platform_data/sgi-w1.h> +#include <linux/rtc/ds1685.h> + +#include <asm/pci/bridge.h> +#include <asm/sn/ioc3.h> + +#define IOC3_IRQ_SERIAL_A 6 +#define IOC3_IRQ_SERIAL_B 15 +#define IOC3_IRQ_KBD 22 + +/* Bitmask for selecting which IRQs are level triggered */ +#define IOC3_LVL_MASK (BIT(IOC3_IRQ_SERIAL_A) | BIT(IOC3_IRQ_SERIAL_B)) + +#define M48T35_REG_SIZE 32768 /* size of m48t35 registers */ + +/* 1.2 us latency timer (40 cycles at 33 MHz) */ +#define IOC3_LATENCY 40 + +struct ioc3_priv_data { + struct irq_domain *domain; + struct ioc3 __iomem *regs; + struct pci_dev *pdev; + int domain_irq; +}; + +static void ioc3_irq_ack(struct irq_data *d) +{ + struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d); + unsigned int hwirq = irqd_to_hwirq(d); + + writel(BIT(hwirq), &ipd->regs->sio_ir); +} + +static void ioc3_irq_mask(struct irq_data *d) +{ + struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d); + unsigned int hwirq = irqd_to_hwirq(d); + + writel(BIT(hwirq), &ipd->regs->sio_iec); +} + +static void ioc3_irq_unmask(struct irq_data *d) +{ + struct ioc3_priv_data *ipd = irq_data_get_irq_chip_data(d); + unsigned int hwirq = irqd_to_hwirq(d); + + writel(BIT(hwirq), &ipd->regs->sio_ies); +} + +static struct irq_chip ioc3_irq_chip = { + .name = "IOC3", + .irq_ack = ioc3_irq_ack, + .irq_mask = ioc3_irq_mask, + .irq_unmask = ioc3_irq_unmask, +}; + +static int ioc3_irq_domain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hwirq) +{ + /* Set level IRQs for every interrupt contained in IOC3_LVL_MASK */ + if (BIT(hwirq) & IOC3_LVL_MASK) + irq_set_chip_and_handler(irq, &ioc3_irq_chip, handle_level_irq); + else + irq_set_chip_and_handler(irq, &ioc3_irq_chip, handle_edge_irq); + + irq_set_chip_data(irq, d->host_data); + return 0; +} + +static void ioc3_irq_domain_unmap(struct irq_domain *d, unsigned int irq) +{ + irq_set_chip_and_handler(irq, NULL, NULL); + irq_set_chip_data(irq, NULL); +} + +static const struct irq_domain_ops ioc3_irq_domain_ops = { + .map = ioc3_irq_domain_map, + .unmap = ioc3_irq_domain_unmap, +}; + +static void ioc3_irq_handler(struct irq_desc *desc) +{ + struct irq_domain *domain = irq_desc_get_handler_data(desc); + struct ioc3_priv_data *ipd = domain->host_data; + struct ioc3 __iomem *regs = ipd->regs; + u32 pending, mask; + unsigned int irq; + + pending = readl(®s->sio_ir); + mask = readl(®s->sio_ies); + pending &= mask; /* Mask off not enabled interrupts */ + + if (pending) { + irq = irq_find_mapping(domain, __ffs(pending)); + if (irq) + generic_handle_irq(irq); + } else { + spurious_interrupt(); + } +} + +/* + * System boards/BaseIOs use more interrupt pins of the bridge ASIC + * to which the IOC3 is connected. Since the IOC3 MFD driver + * knows wiring of these extra pins, we use the map_irq function + * to get interrupts activated + */ +static int ioc3_map_irq(struct pci_dev *pdev, int slot, int pin) +{ + struct pci_host_bridge *hbrg = pci_find_host_bridge(pdev->bus); + + return hbrg->map_irq(pdev, slot, pin); +} + +static int ioc3_irq_domain_setup(struct ioc3_priv_data *ipd, int irq) +{ + struct irq_domain *domain; + struct fwnode_handle *fn; + + fn = irq_domain_alloc_named_fwnode("IOC3"); + if (!fn) + goto err; + + domain = irq_domain_create_linear(fn, 24, &ioc3_irq_domain_ops, ipd); + if (!domain) + goto err; + + irq_domain_free_fwnode(fn); + ipd->domain = domain; + + irq_set_chained_handler_and_data(irq, ioc3_irq_handler, domain); + ipd->domain_irq = irq; + return 0; + +err: + dev_err(&ipd->pdev->dev, "irq domain setup failed\n"); + return -ENOMEM; +} + +static struct resource ioc3_uarta_resources[] = { + DEFINE_RES_MEM(offsetof(struct ioc3, sregs.uarta), + sizeof_field(struct ioc3, sregs.uarta)), + DEFINE_RES_IRQ(IOC3_IRQ_SERIAL_A) +}; + +static struct resource ioc3_uartb_resources[] = { + DEFINE_RES_MEM(offsetof(struct ioc3, sregs.uartb), + sizeof_field(struct ioc3, sregs.uartb)), + DEFINE_RES_IRQ(IOC3_IRQ_SERIAL_B) +}; + +static struct mfd_cell ioc3_serial_cells[] = { + { + .name = "ioc3-serial8250", + .resources = ioc3_uarta_resources, + .num_resources = ARRAY_SIZE(ioc3_uarta_resources), + }, + { + .name = "ioc3-serial8250", + .resources = ioc3_uartb_resources, + .num_resources = ARRAY_SIZE(ioc3_uartb_resources), + } +}; + +static int ioc3_serial_setup(struct ioc3_priv_data *ipd) +{ + int ret; + + /* Set gpio pins for RS232/RS422 mode selection */ + writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL, + &ipd->regs->gpcr_s); + /* Select RS232 mode for uart a */ + writel(0, &ipd->regs->gppr[6]); + /* Select RS232 mode for uart b */ + writel(0, &ipd->regs->gppr[7]); + + /* Switch both ports to 16650 mode */ + writel(readl(&ipd->regs->port_a.sscr) & ~SSCR_DMA_EN, + &ipd->regs->port_a.sscr); + writel(readl(&ipd->regs->port_b.sscr) & ~SSCR_DMA_EN, + &ipd->regs->port_b.sscr); + udelay(1000); /* Wait until mode switch is done */ + + ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO, + ioc3_serial_cells, ARRAY_SIZE(ioc3_serial_cells), + &ipd->pdev->resource[0], 0, ipd->domain); + if (ret) { + dev_err(&ipd->pdev->dev, "Failed to add 16550 subdevs\n"); + return ret; + } + + return 0; +} + +static struct resource ioc3_kbd_resources[] = { + DEFINE_RES_MEM(offsetof(struct ioc3, serio), + sizeof_field(struct ioc3, serio)), + DEFINE_RES_IRQ(IOC3_IRQ_KBD) +}; + +static struct mfd_cell ioc3_kbd_cells[] = { + { + .name = "ioc3-kbd", + .resources = ioc3_kbd_resources, + .num_resources = ARRAY_SIZE(ioc3_kbd_resources), + } +}; + +static int ioc3_kbd_setup(struct ioc3_priv_data *ipd) +{ + int ret; + + ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO, + ioc3_kbd_cells, ARRAY_SIZE(ioc3_kbd_cells), + &ipd->pdev->resource[0], 0, ipd->domain); + if (ret) { + dev_err(&ipd->pdev->dev, "Failed to add 16550 subdevs\n"); + return ret; + } + + return 0; +} + +static struct resource ioc3_eth_resources[] = { + DEFINE_RES_MEM(offsetof(struct ioc3, eth), + sizeof_field(struct ioc3, eth)), + DEFINE_RES_MEM(offsetof(struct ioc3, ssram), + sizeof_field(struct ioc3, ssram)), + DEFINE_RES_IRQ(0) +}; + +static struct resource ioc3_w1_resources[] = { + DEFINE_RES_MEM(offsetof(struct ioc3, mcr), + sizeof_field(struct ioc3, mcr)), +}; +static struct sgi_w1_platform_data ioc3_w1_platform_data; + +static struct mfd_cell ioc3_eth_cells[] = { + { + .name = "ioc3-eth", + .resources = ioc3_eth_resources, + .num_resources = ARRAY_SIZE(ioc3_eth_resources), + }, + { + .name = "sgi_w1", + .resources = ioc3_w1_resources, + .num_resources = ARRAY_SIZE(ioc3_w1_resources), + .platform_data = &ioc3_w1_platform_data, + .pdata_size = sizeof(ioc3_w1_platform_data), + } +}; + +static int ioc3_eth_setup(struct ioc3_priv_data *ipd) +{ + int ret; + + /* Enable One-Wire bus */ + writel(GPCR_MLAN_EN, &ipd->regs->gpcr_s); + + /* Generate unique identifier */ + snprintf(ioc3_w1_platform_data.dev_id, + sizeof(ioc3_w1_platform_data.dev_id), "ioc3-%012llx", + ipd->pdev->resource->start); + + ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO, + ioc3_eth_cells, ARRAY_SIZE(ioc3_eth_cells), + &ipd->pdev->resource[0], ipd->pdev->irq, NULL); + if (ret) { + dev_err(&ipd->pdev->dev, "Failed to add ETH/W1 subdev\n"); + return ret; + } + + return 0; +} + +static struct resource ioc3_m48t35_resources[] = { + DEFINE_RES_MEM(IOC3_BYTEBUS_DEV0, M48T35_REG_SIZE) +}; + +static struct mfd_cell ioc3_m48t35_cells[] = { + { + .name = "rtc-m48t35", + .resources = ioc3_m48t35_resources, + .num_resources = ARRAY_SIZE(ioc3_m48t35_resources), + } +}; + +static int ioc3_m48t35_setup(struct ioc3_priv_data *ipd) +{ + int ret; + + ret = mfd_add_devices(&ipd->pdev->dev, PLATFORM_DEVID_AUTO, + ioc3_m48t35_cells, ARRAY_SIZE(ioc3_m48t35_cells), + &ipd->pdev->resource[0], 0, ipd->domain); + if (ret) + dev_err(&ipd->pdev->dev, "Failed to add M48T35 subdev\n"); + + return ret; +} + +static struct ds1685_rtc_platform_data ip30_rtc_platform_data = { + .bcd_mode = false, + .no_irq = false, + .uie_unsupported = true, + .access_type = ds1685_reg_indirect, +}; + +static struct resource ioc3_rtc_ds1685_resources[] = { + DEFINE_RES_MEM(IOC3_BYTEBUS_DEV1, 1), + DEFINE_RES_MEM(IOC3_BYTEBUS_DEV2, 1), + DEFINE_RES_IRQ(0) +}; + +static struct mfd_cell ioc3_ds1685_cells[] = { + { + .name = "rtc-ds1685", + .resources = ioc3_rtc_ds1685_resources, + .num_resources = ARRAY_SIZE(ioc3_rtc_ds1685_resources), + .platform_data = &ip30_rtc_platform_data, + .pdata_size = sizeof(ip30_rtc_platform_data), + .id = PLATFORM_DEVID_NONE, + } +}; + +static int ioc3_ds1685_setup(struct ioc3_priv_data *ipd) +{ + int ret, irq; + + irq = ioc3_map_irq(ipd->pdev, 6, 0); + + ret = mfd_add_devices(&ipd->pdev->dev, 0, ioc3_ds1685_cells, + ARRAY_SIZE(ioc3_ds1685_cells), + &ipd->pdev->resource[0], irq, NULL); + if (ret) + dev_err(&ipd->pdev->dev, "Failed to add DS1685 subdev\n"); + + return ret; +}; + + +static struct resource ioc3_leds_resources[] = { + DEFINE_RES_MEM(offsetof(struct ioc3, gppr[0]), + sizeof_field(struct ioc3, gppr[0])), + DEFINE_RES_MEM(offsetof(struct ioc3, gppr[1]), + sizeof_field(struct ioc3, gppr[1])), +}; + +static struct mfd_cell ioc3_led_cells[] = { + { + .name = "ip30-leds", + .resources = ioc3_leds_resources, + .num_resources = ARRAY_SIZE(ioc3_leds_resources), + .id = PLATFORM_DEVID_NONE, + } +}; + +static int ioc3_led_setup(struct ioc3_priv_data *ipd) +{ + int ret; + + ret = mfd_add_devices(&ipd->pdev->dev, 0, ioc3_led_cells, + ARRAY_SIZE(ioc3_led_cells), + &ipd->pdev->resource[0], 0, ipd->domain); + if (ret) + dev_err(&ipd->pdev->dev, "Failed to add LED subdev\n"); + + return ret; +} + +static int ip27_baseio_setup(struct ioc3_priv_data *ipd) +{ + int ret, io_irq; + + io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn), + PCI_INTERRUPT_INTB); + ret = ioc3_irq_domain_setup(ipd, io_irq); + if (ret) + return ret; + + ret = ioc3_eth_setup(ipd); + if (ret) + return ret; + + ret = ioc3_serial_setup(ipd); + if (ret) + return ret; + + return ioc3_m48t35_setup(ipd); +} + +static int ip27_baseio6g_setup(struct ioc3_priv_data *ipd) +{ + int ret, io_irq; + + io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn), + PCI_INTERRUPT_INTB); + ret = ioc3_irq_domain_setup(ipd, io_irq); + if (ret) + return ret; + + ret = ioc3_eth_setup(ipd); + if (ret) + return ret; + + ret = ioc3_serial_setup(ipd); + if (ret) + return ret; + + ret = ioc3_m48t35_setup(ipd); + if (ret) + return ret; + + return ioc3_kbd_setup(ipd); +} + +static int ip27_mio_setup(struct ioc3_priv_data *ipd) +{ + int ret; + + ret = ioc3_irq_domain_setup(ipd, ipd->pdev->irq); + if (ret) + return ret; + + ret = ioc3_serial_setup(ipd); + if (ret) + return ret; + + return ioc3_kbd_setup(ipd); +} + +static int ip30_sysboard_setup(struct ioc3_priv_data *ipd) +{ + int ret, io_irq; + + io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn), + PCI_INTERRUPT_INTB); + ret = ioc3_irq_domain_setup(ipd, io_irq); + if (ret) + return ret; + + ret = ioc3_eth_setup(ipd); + if (ret) + return ret; + + ret = ioc3_serial_setup(ipd); + if (ret) + return ret; + + ret = ioc3_kbd_setup(ipd); + if (ret) + return ret; + + ret = ioc3_ds1685_setup(ipd); + if (ret) + return ret; + + return ioc3_led_setup(ipd); +} + +static int ioc3_menet_setup(struct ioc3_priv_data *ipd) +{ + int ret, io_irq; + + io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn), + PCI_INTERRUPT_INTB); + ret = ioc3_irq_domain_setup(ipd, io_irq); + if (ret) + return ret; + + ret = ioc3_eth_setup(ipd); + if (ret) + return ret; + + return ioc3_serial_setup(ipd); +} + +static int ioc3_menet4_setup(struct ioc3_priv_data *ipd) +{ + return ioc3_eth_setup(ipd); +} + +static int ioc3_cad_duo_setup(struct ioc3_priv_data *ipd) +{ + int ret, io_irq; + + io_irq = ioc3_map_irq(ipd->pdev, PCI_SLOT(ipd->pdev->devfn), + PCI_INTERRUPT_INTB); + ret = ioc3_irq_domain_setup(ipd, io_irq); + if (ret) + return ret; + + ret = ioc3_eth_setup(ipd); + if (ret) + return ret; + + return ioc3_kbd_setup(ipd); +} + +/* Helper macro for filling ioc3_info array */ +#define IOC3_SID(_name, _sid, _setup) \ + { \ + .name = _name, \ + .sid = PCI_VENDOR_ID_SGI | (IOC3_SUBSYS_ ## _sid << 16), \ + .setup = _setup, \ + } + +static struct { + const char *name; + u32 sid; + int (*setup)(struct ioc3_priv_data *ipd); +} ioc3_infos[] = { + IOC3_SID("IP27 BaseIO6G", IP27_BASEIO6G, &ip27_baseio6g_setup), + IOC3_SID("IP27 MIO", IP27_MIO, &ip27_mio_setup), + IOC3_SID("IP27 BaseIO", IP27_BASEIO, &ip27_baseio_setup), + IOC3_SID("IP29 System Board", IP29_SYSBOARD, &ip27_baseio6g_setup), + IOC3_SID("IP30 System Board", IP30_SYSBOARD, &ip30_sysboard_setup), + IOC3_SID("MENET", MENET, &ioc3_menet_setup), + IOC3_SID("MENET4", MENET4, &ioc3_menet4_setup) +}; +#undef IOC3_SID + +static int ioc3_setup(struct ioc3_priv_data *ipd) +{ + u32 sid; + int i; + + /* Clear IRQs */ + writel(~0, &ipd->regs->sio_iec); + writel(~0, &ipd->regs->sio_ir); + writel(0, &ipd->regs->eth.eier); + writel(~0, &ipd->regs->eth.eisr); + + /* Read subsystem vendor id and subsystem id */ + pci_read_config_dword(ipd->pdev, PCI_SUBSYSTEM_VENDOR_ID, &sid); + + for (i = 0; i < ARRAY_SIZE(ioc3_infos); i++) + if (sid == ioc3_infos[i].sid) { + pr_info("ioc3: %s\n", ioc3_infos[i].name); + return ioc3_infos[i].setup(ipd); + } + + /* Treat everything not identified by PCI subid as CAD DUO */ + pr_info("ioc3: CAD DUO\n"); + return ioc3_cad_duo_setup(ipd); +} + +static int ioc3_mfd_probe(struct pci_dev *pdev, + const struct pci_device_id *pci_id) +{ + struct ioc3_priv_data *ipd; + struct ioc3 __iomem *regs; + int ret; + + ret = pci_enable_device(pdev); + if (ret) + return ret; + + pci_write_config_byte(pdev, PCI_LATENCY_TIMER, IOC3_LATENCY); + pci_set_master(pdev); + + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (ret) { + pr_err("%s: No usable DMA configuration, aborting.\n", + pci_name(pdev)); + goto out_disable_device; + } + + /* Set up per-IOC3 data */ + ipd = devm_kzalloc(&pdev->dev, sizeof(struct ioc3_priv_data), + GFP_KERNEL); + if (!ipd) { + ret = -ENOMEM; + goto out_disable_device; + } + ipd->pdev = pdev; + + /* + * Map all IOC3 registers. These are shared between subdevices + * so the main IOC3 module manages them. + */ + regs = pci_ioremap_bar(pdev, 0); + if (!regs) { + dev_warn(&pdev->dev, "ioc3: Unable to remap PCI BAR for %s.\n", + pci_name(pdev)); + ret = -ENOMEM; + goto out_disable_device; + } + ipd->regs = regs; + + /* Track PCI-device specific data */ + pci_set_drvdata(pdev, ipd); + + ret = ioc3_setup(ipd); + if (ret) { + /* Remove all already added MFD devices */ + mfd_remove_devices(&ipd->pdev->dev); + if (ipd->domain) { + irq_domain_remove(ipd->domain); + free_irq(ipd->domain_irq, (void *)ipd); + } + pci_iounmap(pdev, regs); + goto out_disable_device; + } + + return 0; + +out_disable_device: + pci_disable_device(pdev); + return ret; +} + +static void ioc3_mfd_remove(struct pci_dev *pdev) +{ + struct ioc3_priv_data *ipd; + + ipd = pci_get_drvdata(pdev); + + /* Clear and disable all IRQs */ + writel(~0, &ipd->regs->sio_iec); + writel(~0, &ipd->regs->sio_ir); + + /* Release resources */ + mfd_remove_devices(&ipd->pdev->dev); + if (ipd->domain) { + irq_domain_remove(ipd->domain); + free_irq(ipd->domain_irq, (void *)ipd); + } + pci_iounmap(pdev, ipd->regs); + pci_disable_device(pdev); +} + +static struct pci_device_id ioc3_mfd_id_table[] = { + { PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, ioc3_mfd_id_table); + +static struct pci_driver ioc3_mfd_driver = { + .name = "IOC3", + .id_table = ioc3_mfd_id_table, + .probe = ioc3_mfd_probe, + .remove = ioc3_mfd_remove, +}; + +module_pci_driver(ioc3_mfd_driver); + +MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>"); +MODULE_DESCRIPTION("SGI IOC3 MFD driver"); +MODULE_LICENSE("GPL v2"); |