From 5dc76a96e95ae041c1d8e52714bd77576b35919b Mon Sep 17 00:00:00 2001 From: Thomas Bogendoerfer Date: Thu, 3 Oct 2019 11:52:30 +0200 Subject: [PATCH] MIPS: PCI: use information from 1-wire PROM for IOC3 detection IOC3 chips in SGI system are conntected to a bridge ASIC, which has a 1-wire prom attached with part number information. This changeset uses this information to create PCI subsystem information, which the MFD driver uses for further platform device setup. Signed-off-by: Thomas Bogendoerfer Signed-off-by: Paul Burton Cc: Jonathan Corbet Cc: Ralf Baechle Cc: James Hogan Cc: Lee Jones Cc: David S. Miller Cc: Srinivas Kandagatla Cc: Alessandro Zummo Cc: Alexandre Belloni Cc: Greg Kroah-Hartman Cc: Jiri Slaby Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-rtc@vger.kernel.org Cc: linux-serial@vger.kernel.org --- arch/mips/include/asm/pci/bridge.h | 1 + arch/mips/include/asm/sn/ioc3.h | 9 +++ arch/mips/pci/pci-xtalk-bridge.c | 135 ++++++++++++++++++++++++++++++++++++- arch/mips/sgi-ip27/ip27-xtalk.c | 38 +++++++++-- 4 files changed, 175 insertions(+), 8 deletions(-) diff --git a/arch/mips/include/asm/pci/bridge.h b/arch/mips/include/asm/pci/bridge.h index a92cd30..3bc630f 100644 --- a/arch/mips/include/asm/pci/bridge.h +++ b/arch/mips/include/asm/pci/bridge.h @@ -807,6 +807,7 @@ struct bridge_controller { unsigned long intr_addr; struct irq_domain *domain; unsigned int pci_int[8]; + u32 ioc3_sid[8]; nasid_t nasid; }; diff --git a/arch/mips/include/asm/sn/ioc3.h b/arch/mips/include/asm/sn/ioc3.h index a947eed..78ef760 100644 --- a/arch/mips/include/asm/sn/ioc3.h +++ b/arch/mips/include/asm/sn/ioc3.h @@ -590,4 +590,13 @@ struct ioc3_etxd { #define MIDR_DATA_MASK 0x0000ffff +/* subsystem IDs supplied by card detection in pci-xtalk-bridge */ +#define IOC3_SUBSYS_IP27_BASEIO6G 0xc300 +#define IOC3_SUBSYS_IP27_MIO 0xc301 +#define IOC3_SUBSYS_IP27_BASEIO 0xc302 +#define IOC3_SUBSYS_IP29_SYSBOARD 0xc303 +#define IOC3_SUBSYS_IP30_SYSBOARD 0xc304 +#define IOC3_SUBSYS_MENET 0xc305 +#define IOC3_SUBSYS_MENET4 0xc306 + #endif /* MIPS_SN_IOC3_H */ diff --git a/arch/mips/pci/pci-xtalk-bridge.c b/arch/mips/pci/pci-xtalk-bridge.c index 4bb5e32..3126321 100644 --- a/arch/mips/pci/pci-xtalk-bridge.c +++ b/arch/mips/pci/pci-xtalk-bridge.c @@ -11,16 +11,22 @@ #include #include #include +#include +#include #include #include #include +#include + +#define CRC16_INIT 0 +#define CRC16_VALID 0xb001 /* * Most of the IOC3 PCI config register aren't present * we emulate what is needed for a normal PCI enumeration */ -static int ioc3_cfg_rd(void *addr, int where, int size, u32 *value) +static int ioc3_cfg_rd(void *addr, int where, int size, u32 *value, u32 sid) { u32 cf, shift, mask; @@ -30,6 +36,9 @@ static int ioc3_cfg_rd(void *addr, int where, int size, u32 *value) if (get_dbe(cf, (u32 *)addr)) return PCIBIOS_DEVICE_NOT_FOUND; break; + case 0x2c: + cf = sid; + break; case 0x3c: /* emulate sane interrupt pin value */ cf = 0x00000100; @@ -111,7 +120,8 @@ static int pci_conf0_read_config(struct pci_bus *bus, unsigned int devfn, */ if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16))) { addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2]; - return ioc3_cfg_rd(addr, where, size, value); + return ioc3_cfg_rd(addr, where, size, value, + bc->ioc3_sid[slot]); } addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[where ^ (4 - size)]; @@ -149,7 +159,8 @@ static int pci_conf1_read_config(struct pci_bus *bus, unsigned int devfn, */ if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16))) { addr = &bridge->b_type1_cfg.c[(fn << 8) | (where & ~3)]; - return ioc3_cfg_rd(addr, where, size, value); + return ioc3_cfg_rd(addr, where, size, value, + bc->ioc3_sid[slot]); } addr = &bridge->b_type1_cfg.c[(fn << 8) | (where ^ (4 - size))]; @@ -426,6 +437,117 @@ static int bridge_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) return irq; } +#define IOC3_SID(sid) (PCI_VENDOR_ID_SGI << 16 | (sid)) + +static void bridge_setup_ip27_baseio6g(struct bridge_controller *bc) +{ + bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP27_BASEIO6G); + bc->ioc3_sid[6] = IOC3_SID(IOC3_SUBSYS_IP27_MIO); +} + +static void bridge_setup_ip27_baseio(struct bridge_controller *bc) +{ + bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP27_BASEIO); +} + +static void bridge_setup_ip29_baseio(struct bridge_controller *bc) +{ + bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP29_SYSBOARD); +} + +static void bridge_setup_ip30_sysboard(struct bridge_controller *bc) +{ + bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_IP30_SYSBOARD); +} + +static void bridge_setup_menet(struct bridge_controller *bc) +{ + bc->ioc3_sid[0] = IOC3_SID(IOC3_SUBSYS_MENET); + bc->ioc3_sid[1] = IOC3_SID(IOC3_SUBSYS_MENET); + bc->ioc3_sid[2] = IOC3_SID(IOC3_SUBSYS_MENET); + bc->ioc3_sid[3] = IOC3_SID(IOC3_SUBSYS_MENET4); +} + +#define BRIDGE_BOARD_SETUP(_partno, _setup) \ + { .match = _partno, .setup = _setup } + +static const struct { + char *match; + void (*setup)(struct bridge_controller *bc); +} bridge_ioc3_devid[] = { + BRIDGE_BOARD_SETUP("030-0734-", bridge_setup_ip27_baseio6g), + BRIDGE_BOARD_SETUP("030-0880-", bridge_setup_ip27_baseio6g), + BRIDGE_BOARD_SETUP("030-1023-", bridge_setup_ip27_baseio), + BRIDGE_BOARD_SETUP("030-1124-", bridge_setup_ip27_baseio), + BRIDGE_BOARD_SETUP("030-1025-", bridge_setup_ip29_baseio), + BRIDGE_BOARD_SETUP("030-1244-", bridge_setup_ip29_baseio), + BRIDGE_BOARD_SETUP("030-1389-", bridge_setup_ip29_baseio), + BRIDGE_BOARD_SETUP("030-0887-", bridge_setup_ip30_sysboard), + BRIDGE_BOARD_SETUP("030-1467-", bridge_setup_ip30_sysboard), + BRIDGE_BOARD_SETUP("030-0873-", bridge_setup_menet), +}; + +static void bridge_setup_board(struct bridge_controller *bc, char *partnum) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(bridge_ioc3_devid); i++) + if (!strncmp(partnum, bridge_ioc3_devid[i].match, + strlen(bridge_ioc3_devid[i].match))) { + bridge_ioc3_devid[i].setup(bc); + } +} + +static int bridge_nvmem_match(struct device *dev, const void *data) +{ + const char *name = dev_name(dev); + const char *prefix = data; + + if (strlen(name) < strlen(prefix)) + return 0; + + return memcmp(prefix, dev_name(dev), strlen(prefix)) == 0; +} + +static int bridge_get_partnum(u64 baddr, char *partnum) +{ + struct nvmem_device *nvmem; + char prefix[24]; + u8 prom[64]; + int i, j; + int ret; + + snprintf(prefix, sizeof(prefix), "bridge-%012llx-0b-", baddr); + + nvmem = nvmem_device_find(prefix, bridge_nvmem_match); + if (IS_ERR(nvmem)) + return PTR_ERR(nvmem); + + ret = nvmem_device_read(nvmem, 0, 64, prom); + nvmem_device_put(nvmem); + + if (ret != 64) + return ret; + + if (crc16(CRC16_INIT, prom, 32) != CRC16_VALID || + crc16(CRC16_INIT, prom + 32, 32) != CRC16_VALID) + return -EINVAL; + + /* Assemble part number */ + j = 0; + for (i = 0; i < 19; i++) + if (prom[i + 11] != ' ') + partnum[j++] = prom[i + 11]; + + for (i = 0; i < 6; i++) + if (prom[i + 32] != ' ') + partnum[j++] = prom[i + 32]; + + partnum[j] = 0; + + return 0; +} + static int bridge_probe(struct platform_device *pdev) { struct xtalk_bridge_platform_data *bd = dev_get_platdata(&pdev->dev); @@ -434,9 +556,14 @@ static int bridge_probe(struct platform_device *pdev) struct pci_host_bridge *host; struct irq_domain *domain, *parent; struct fwnode_handle *fn; + char partnum[26]; int slot; int err; + /* get part number from one wire prom */ + if (bridge_get_partnum(virt_to_phys((void *)bd->bridge_addr), partnum)) + return -EPROBE_DEFER; /* not available yet */ + parent = irq_get_default_host(); if (!parent) return -ENODEV; @@ -517,6 +644,8 @@ static int bridge_probe(struct platform_device *pdev) } bridge_read(bc, b_wid_tflush); /* wait until Bridge PIO complete */ + bridge_setup_board(bc, partnum); + host->dev.parent = dev; host->sysdata = bc; host->busnr = 0; diff --git a/arch/mips/sgi-ip27/ip27-xtalk.c b/arch/mips/sgi-ip27/ip27-xtalk.c index 5602bb1..5218b90 100644 --- a/arch/mips/sgi-ip27/ip27-xtalk.c +++ b/arch/mips/sgi-ip27/ip27-xtalk.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -26,9 +27,35 @@ static void bridge_platform_create(nasid_t nasid, int widget, int masterwid) { struct xtalk_bridge_platform_data *bd; + struct sgi_w1_platform_data *wd; struct platform_device *pdev; + struct resource w1_res; unsigned long offset; + offset = NODE_OFFSET(nasid); + + wd = kzalloc(sizeof(*wd), GFP_KERNEL); + if (!wd) + goto no_mem; + + snprintf(wd->dev_id, sizeof(wd->dev_id), "bridge-%012lx", + offset + (widget << SWIN_SIZE_BITS)); + + memset(&w1_res, 0, sizeof(w1_res)); + w1_res.start = offset + (widget << SWIN_SIZE_BITS) + + offsetof(struct bridge_regs, b_nic); + w1_res.end = w1_res.start + 3; + w1_res.flags = IORESOURCE_MEM; + + pdev = platform_device_alloc("sgi_w1", PLATFORM_DEVID_AUTO); + if (!pdev) { + kfree(wd); + goto no_mem; + } + platform_device_add_resources(pdev, &w1_res, 1); + platform_device_add_data(pdev, wd, sizeof(*wd)); + platform_device_add(pdev); + bd = kzalloc(sizeof(*bd), GFP_KERNEL); if (!bd) goto no_mem; @@ -38,7 +65,6 @@ static void bridge_platform_create(nasid_t nasid, int widget, int masterwid) goto no_mem; } - offset = NODE_OFFSET(nasid); bd->bridge_addr = RAW_NODE_SWIN_BASE(nasid, widget); bd->intr_addr = BIT_ULL(47) + 0x01800000 + PI_INT_PEND_MOD; @@ -46,14 +72,14 @@ static void bridge_platform_create(nasid_t nasid, int widget, int masterwid) bd->masterwid = masterwid; bd->mem.name = "Bridge PCI MEM"; - bd->mem.start = offset + (widget << SWIN_SIZE_BITS); - bd->mem.end = bd->mem.start + SWIN_SIZE - 1; + bd->mem.start = offset + (widget << SWIN_SIZE_BITS) + BRIDGE_DEVIO0; + bd->mem.end = offset + (widget << SWIN_SIZE_BITS) + SWIN_SIZE - 1; bd->mem.flags = IORESOURCE_MEM; bd->mem_offset = offset; bd->io.name = "Bridge PCI IO"; - bd->io.start = offset + (widget << SWIN_SIZE_BITS); - bd->io.end = bd->io.start + SWIN_SIZE - 1; + bd->io.start = offset + (widget << SWIN_SIZE_BITS) + BRIDGE_DEVIO0; + bd->io.end = offset + (widget << SWIN_SIZE_BITS) + SWIN_SIZE - 1; bd->io.flags = IORESOURCE_IO; bd->io_offset = offset; @@ -81,6 +107,8 @@ static int probe_one_port(nasid_t nasid, int widget, int masterwid) bridge_platform_create(nasid, widget, masterwid); break; default: + pr_info("xtalk:n%d/%d unknown widget (0x%x)\n", + nasid, widget, partnum); break; } -- 2.7.4