diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/powermac/feature.c | 127 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/low_i2c.c | 853 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/setup.c | 23 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/smp.c | 75 |
4 files changed, 730 insertions, 348 deletions
diff --git a/arch/powerpc/platforms/powermac/feature.c b/arch/powerpc/platforms/powermac/feature.c index d2915d6..b271b11 100644 --- a/arch/powerpc/platforms/powermac/feature.c +++ b/arch/powerpc/platforms/powermac/feature.c @@ -1677,124 +1677,6 @@ intrepid_shutdown(struct macio_chip *macio, int sleep_mode) } -void pmac_tweak_clock_spreading(int enable) -{ - struct macio_chip *macio = &macio_chips[0]; - - /* Hack for doing clock spreading on some machines PowerBooks and - * iBooks. This implements the "platform-do-clockspreading" OF - * property as decoded manually on various models. For safety, we also - * check the product ID in the device-tree in cases we'll whack the i2c - * chip to make reasonably sure we won't set wrong values in there - * - * Of course, ultimately, we have to implement a real parser for - * the platform-do-* stuff... - */ - - if (macio->type == macio_intrepid) { - struct device_node *clock = - of_find_node_by_path("/uni-n@f8000000/hw-clock"); - if (clock && get_property(clock, "platform-do-clockspreading", - NULL)) { - printk(KERN_INFO "%sabling clock spreading on Intrepid" - " ASIC\n", enable ? "En" : "Dis"); - if (enable) - UN_OUT(UNI_N_CLOCK_SPREADING, 2); - else - UN_OUT(UNI_N_CLOCK_SPREADING, 0); - mdelay(40); - } - of_node_put(clock); - } - - while (machine_is_compatible("PowerBook5,2") || - machine_is_compatible("PowerBook5,3") || - machine_is_compatible("PowerBook6,2") || - machine_is_compatible("PowerBook6,3")) { - struct device_node *ui2c = of_find_node_by_type(NULL, "i2c"); - struct device_node *dt = of_find_node_by_name(NULL, "device-tree"); - u8 buffer[9]; - u32 *productID; - int i, rc, changed = 0; - - if (dt == NULL) - break; - productID = (u32 *)get_property(dt, "pid#", NULL); - if (productID == NULL) - break; - while(ui2c) { - struct device_node *p = of_get_parent(ui2c); - if (p && !strcmp(p->name, "uni-n")) - break; - ui2c = of_find_node_by_type(ui2c, "i2c"); - } - if (ui2c == NULL) - break; - DBG("Trying to bump clock speed for PID: %08x...\n", *productID); - rc = pmac_low_i2c_open(ui2c, 1); - if (rc != 0) - break; - pmac_low_i2c_setmode(ui2c, pmac_low_i2c_mode_combined); - rc = pmac_low_i2c_xfer(ui2c, 0xd2 | pmac_low_i2c_read, 0x80, buffer, 9); - DBG("read result: %d,", rc); - if (rc != 0) { - pmac_low_i2c_close(ui2c); - break; - } - for (i=0; i<9; i++) - DBG(" %02x", buffer[i]); - DBG("\n"); - - switch(*productID) { - case 0x1182: /* AlBook 12" rev 2 */ - case 0x1183: /* iBook G4 12" */ - buffer[0] = (buffer[0] & 0x8f) | 0x70; - buffer[2] = (buffer[2] & 0x7f) | 0x00; - buffer[5] = (buffer[5] & 0x80) | 0x31; - buffer[6] = (buffer[6] & 0x40) | 0xb0; - buffer[7] = (buffer[7] & 0x00) | (enable ? 0xc0 : 0xba); - buffer[8] = (buffer[8] & 0x00) | 0x30; - changed = 1; - break; - case 0x3142: /* AlBook 15" (ATI M10) */ - case 0x3143: /* AlBook 17" (ATI M10) */ - buffer[0] = (buffer[0] & 0xaf) | 0x50; - buffer[2] = (buffer[2] & 0x7f) | 0x00; - buffer[5] = (buffer[5] & 0x80) | 0x31; - buffer[6] = (buffer[6] & 0x40) | 0xb0; - buffer[7] = (buffer[7] & 0x00) | (enable ? 0xd0 : 0xc0); - buffer[8] = (buffer[8] & 0x00) | 0x30; - changed = 1; - break; - default: - DBG("i2c-hwclock: Machine model not handled\n"); - break; - } - if (!changed) { - pmac_low_i2c_close(ui2c); - break; - } - printk(KERN_INFO "%sabling clock spreading on i2c clock chip\n", - enable ? "En" : "Dis"); - - pmac_low_i2c_setmode(ui2c, pmac_low_i2c_mode_stdsub); - rc = pmac_low_i2c_xfer(ui2c, 0xd2 | pmac_low_i2c_write, 0x80, buffer, 9); - DBG("write result: %d,", rc); - pmac_low_i2c_setmode(ui2c, pmac_low_i2c_mode_combined); - rc = pmac_low_i2c_xfer(ui2c, 0xd2 | pmac_low_i2c_read, 0x80, buffer, 9); - DBG("read result: %d,", rc); - if (rc != 0) { - pmac_low_i2c_close(ui2c); - break; - } - for (i=0; i<9; i++) - DBG(" %02x", buffer[i]); - pmac_low_i2c_close(ui2c); - break; - } -} - - static int core99_sleep(void) { @@ -2980,12 +2862,6 @@ set_initial_features(void) MACIO_BIC(HEATHROW_FCR, HRW_SOUND_POWER_N); } - /* Some machine models need the clock chip to be properly setup for - * clock spreading now. This should be a platform function but we - * don't do these at the moment - */ - pmac_tweak_clock_spreading(1); - #endif /* CONFIG_POWER4 */ /* On all machines, switch modem & serial ports off */ @@ -3013,9 +2889,6 @@ pmac_feature_init(void) return; } - /* Setup low-level i2c stuffs */ - pmac_init_low_i2c(); - /* Probe machine type */ if (probe_motherboard()) printk(KERN_WARNING "Unknown PowerMac !\n"); diff --git a/arch/powerpc/platforms/powermac/low_i2c.c b/arch/powerpc/platforms/powermac/low_i2c.c index 606e0ed..f31d6a6 100644 --- a/arch/powerpc/platforms/powermac/low_i2c.c +++ b/arch/powerpc/platforms/powermac/low_i2c.c @@ -1,22 +1,34 @@ /* - * arch/ppc/platforms/pmac_low_i2c.c + * arch/powerpc/platforms/powermac/low_i2c.c * - * Copyright (C) 2003 Ben. Herrenschmidt (benh@kernel.crashing.org) + * Copyright (C) 2003-2005 Ben. Herrenschmidt (benh@kernel.crashing.org) * * 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 file contains some low-level i2c access routines that - * need to be used by various bits of the PowerMac platform code - * at times where the real asynchronous & interrupt driven driver - * cannot be used. The API borrows some semantics from the darwin - * driver in order to ease the implementation of the platform - * properties parser + * The linux i2c layer isn't completely suitable for our needs for various + * reasons ranging from too late initialisation to semantics not perfectly + * matching some requirements of the apple platform functions etc... + * + * This file thus provides a simple low level unified i2c interface for + * powermac that covers the various types of i2c busses used in Apple machines. + * For now, keywest, PMU and SMU, though we could add Cuda, or other bit + * banging busses found on older chipstes in earlier machines if we ever need + * one of them. + * + * The drivers in this file are synchronous/blocking. In addition, the + * keywest one is fairly slow due to the use of msleep instead of interrupts + * as the interrupt is currently used by i2c-keywest. In the long run, we + * might want to get rid of those high-level interfaces to linux i2c layer + * either completely (converting all drivers) or replacing them all with a + * single stub driver on top of this one. Once done, the interrupt will be + * available for our use. */ #undef DEBUG +#undef DEBUG_LOW #include <linux/config.h> #include <linux/types.h> @@ -25,15 +37,16 @@ #include <linux/module.h> #include <linux/adb.h> #include <linux/pmu.h> +#include <linux/delay.h> +#include <linux/completion.h> #include <asm/keylargo.h> #include <asm/uninorth.h> #include <asm/io.h> #include <asm/prom.h> #include <asm/machdep.h> +#include <asm/smu.h> #include <asm/pmac_low_i2c.h> -#define MAX_LOW_I2C_HOST 4 - #ifdef DEBUG #define DBG(x...) do {\ printk(KERN_DEBUG "low_i2c:" x); \ @@ -42,49 +55,54 @@ #define DBG(x...) #endif -struct low_i2c_host; - -typedef int (*low_i2c_func_t)(struct low_i2c_host *host, u8 addr, u8 sub, u8 *data, int len); - -struct low_i2c_host -{ - struct device_node *np; /* OF device node */ - struct semaphore mutex; /* Access mutex for use by i2c-keywest */ - low_i2c_func_t func; /* Access function */ - unsigned int is_open : 1; /* Poor man's access control */ - int mode; /* Current mode */ - int channel; /* Current channel */ - int num_channels; /* Number of channels */ - void __iomem *base; /* For keywest-i2c, base address */ - int bsteps; /* And register stepping */ - int speed; /* And speed */ -}; - -static struct low_i2c_host low_i2c_hosts[MAX_LOW_I2C_HOST]; +#ifdef DEBUG_LOW +#define DBG_LOW(x...) do {\ + printk(KERN_DEBUG "low_i2c:" x); \ + } while(0) +#else +#define DBG_LOW(x...) +#endif -/* No locking is necessary on allocation, we are running way before - * anything can race with us +/* + * A bus structure. Each bus in the system has such a structure associated. */ -static struct low_i2c_host *find_low_i2c_host(struct device_node *np) +struct pmac_i2c_bus { - int i; + struct list_head link; + struct device_node *controller; + struct device_node *busnode; + int type; + int flags; + struct i2c_adapter *adapter; + void *hostdata; + int channel; /* some hosts have multiple */ + int mode; /* current mode */ + struct semaphore sem; + int opened; + int polled; /* open mode */ + + /* ops */ + int (*open)(struct pmac_i2c_bus *bus); + void (*close)(struct pmac_i2c_bus *bus); + int (*xfer)(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, + u32 subaddr, u8 *data, int len); +}; - for (i = 0; i < MAX_LOW_I2C_HOST; i++) - if (low_i2c_hosts[i].np == np) - return &low_i2c_hosts[i]; - return NULL; -} +static LIST_HEAD(pmac_i2c_busses); /* - * - * i2c-keywest implementation (UniNorth, U2, U3, Keylargo's) - * + * Keywest implementation */ -/* - * Keywest i2c definitions borrowed from drivers/i2c/i2c-keywest.h, - * should be moved somewhere in include/asm-ppc/ - */ +struct pmac_i2c_host_kw +{ + struct semaphore mutex; /* Access mutex for use by + * i2c-keywest */ + void __iomem *base; /* register base address */ + int bsteps; /* register stepping */ + int speed; /* speed */ +}; + /* Register indices */ typedef enum { reg_mode = 0, @@ -153,52 +171,56 @@ static const char *__kw_state_names[] = { "state_dead" }; -static inline u8 __kw_read_reg(struct low_i2c_host *host, reg_t reg) +static inline u8 __kw_read_reg(struct pmac_i2c_bus *bus, reg_t reg) { + struct pmac_i2c_host_kw *host = bus->hostdata; return readb(host->base + (((unsigned int)reg) << host->bsteps)); } -static inline void __kw_write_reg(struct low_i2c_host *host, reg_t reg, u8 val) +static inline void __kw_write_reg(struct pmac_i2c_bus *bus, reg_t reg, u8 val) { + struct pmac_i2c_host_kw *host = bus->hostdata; writeb(val, host->base + (((unsigned)reg) << host->bsteps)); - (void)__kw_read_reg(host, reg_subaddr); + (void)__kw_read_reg(bus, reg_subaddr); } -#define kw_write_reg(reg, val) __kw_write_reg(host, reg, val) -#define kw_read_reg(reg) __kw_read_reg(host, reg) +#define kw_write_reg(reg, val) __kw_write_reg(bus, reg, val) +#define kw_read_reg(reg) __kw_read_reg(bus, reg) - -/* Don't schedule, the g5 fan controller is too - * timing sensitive - */ -static u8 kw_wait_interrupt(struct low_i2c_host* host) +static u8 kw_i2c_wait_interrupt(struct pmac_i2c_bus* bus) { int i, j; u8 isr; - for (i = 0; i < 100000; i++) { + for (i = 0; i < 1000; i++) { isr = kw_read_reg(reg_isr) & KW_I2C_IRQ_MASK; if (isr != 0) return isr; /* This code is used with the timebase frozen, we cannot rely - * on udelay ! For now, just use a bogus loop + * on udelay nor schedule when in polled mode ! + * For now, just use a bogus loop.... */ - for (j = 1; j < 10000; j++) - mb(); + if (bus->polled) { + for (j = 1; j < 1000000; j++) + mb(); + } else + msleep(1); } return isr; } -static int kw_handle_interrupt(struct low_i2c_host *host, int state, int rw, int *rc, u8 **data, int *len, u8 isr) +static int kw_i2c_handle_interrupt(struct pmac_i2c_bus *bus, int state, int rw, + int *rc, u8 **data, int *len, u8 isr) { u8 ack; - DBG("kw_handle_interrupt(%s, isr: %x)\n", __kw_state_names[state], isr); + DBG_LOW("kw_handle_interrupt(%s, isr: %x)\n", + __kw_state_names[state], isr); if (isr == 0) { if (state != state_stop) { - DBG("KW: Timeout !\n"); + DBG_LOW("KW: Timeout !\n"); *rc = -EIO; goto stop; } @@ -220,15 +242,16 @@ static int kw_handle_interrupt(struct low_i2c_host *host, int state, int rw, int *rc = -EIO; goto stop; } - if ((ack & KW_I2C_STAT_LAST_AAK) == 0) { + if ((ack & KW_I2C_STAT_LAST_AAK) == 0) { *rc = -ENODEV; - DBG("KW: NAK on address\n"); + DBG_LOW("KW: NAK on address\n"); return state_stop; } else { if (rw) { state = state_read; if (*len > 1) - kw_write_reg(reg_control, KW_I2C_CTL_AAK); + kw_write_reg(reg_control, + KW_I2C_CTL_AAK); } else { state = state_write; kw_write_reg(reg_data, **data); @@ -250,7 +273,7 @@ static int kw_handle_interrupt(struct low_i2c_host *host, int state, int rw, int } else if (state == state_write) { ack = kw_read_reg(reg_status); if ((ack & KW_I2C_STAT_LAST_AAK) == 0) { - DBG("KW: nack on data write\n"); + DBG_LOW("KW: nack on data write\n"); *rc = -EIO; goto stop; } else if (*len) { @@ -291,35 +314,57 @@ static int kw_handle_interrupt(struct low_i2c_host *host, int state, int rw, int return state_stop; } -static int keywest_low_i2c_func(struct low_i2c_host *host, u8 addr, u8 subaddr, u8 *data, int len) +static int kw_i2c_open(struct pmac_i2c_bus *bus) { + struct pmac_i2c_host_kw *host = bus->hostdata; + down(&host->mutex); + return 0; +} + +static void kw_i2c_close(struct pmac_i2c_bus *bus) +{ + struct pmac_i2c_host_kw *host = bus->hostdata; + up(&host->mutex); +} + +static int kw_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, + u32 subaddr, u8 *data, int len) +{ + struct pmac_i2c_host_kw *host = bus->hostdata; u8 mode_reg = host->speed; int state = state_addr; int rc = 0; /* Setup mode & subaddress if any */ - switch(host->mode) { - case pmac_low_i2c_mode_dumb: - printk(KERN_ERR "low_i2c: Dumb mode not supported !\n"); + switch(bus->mode) { + case pmac_i2c_mode_dumb: return -EINVAL; - case pmac_low_i2c_mode_std: + case pmac_i2c_mode_std: mode_reg |= KW_I2C_MODE_STANDARD; + if (subsize != 0) + return -EINVAL; break; - case pmac_low_i2c_mode_stdsub: + case pmac_i2c_mode_stdsub: mode_reg |= KW_I2C_MODE_STANDARDSUB; + if (subsize != 1) + return -EINVAL; break; - case pmac_low_i2c_mode_combined: + case pmac_i2c_mode_combined: mode_reg |= KW_I2C_MODE_COMBINED; + if (subsize != 1) + return -EINVAL; break; } /* Setup channel & clear pending irqs */ kw_write_reg(reg_isr, kw_read_reg(reg_isr)); - kw_write_reg(reg_mode, mode_reg | (host->channel << 4)); + kw_write_reg(reg_mode, mode_reg | (bus->channel << 4)); kw_write_reg(reg_status, 0); - /* Set up address and r/w bit */ - kw_write_reg(reg_addr, addr); + /* Set up address and r/w bit, strip possible stale bus number from + * address top bits + */ + kw_write_reg(reg_addr, addrdir & 0xff); /* Set up the sub address */ if ((mode_reg & KW_I2C_MODE_MODE_MASK) == KW_I2C_MODE_STANDARDSUB @@ -330,27 +375,27 @@ static int keywest_low_i2c_func(struct low_i2c_host *host, u8 addr, u8 subaddr, kw_write_reg(reg_ier, 0 /*KW_I2C_IRQ_MASK*/); kw_write_reg(reg_control, KW_I2C_CTL_XADDR); - /* State machine, to turn into an interrupt handler */ + /* State machine, to turn into an interrupt handler in the future */ while(state != state_idle) { - u8 isr = kw_wait_interrupt(host); - state = kw_handle_interrupt(host, state, addr & 1, &rc, &data, &len, isr); + u8 isr = kw_i2c_wait_interrupt(bus); + state = kw_i2c_handle_interrupt(bus, state, addrdir & 1, &rc, + &data, &len, isr); } return rc; } -static void keywest_low_i2c_add(struct device_node *np) +static struct pmac_i2c_host_kw *__init kw_i2c_host_init(struct device_node *np) { - struct low_i2c_host *host = find_low_i2c_host(NULL); + struct pmac_i2c_host_kw *host; u32 *psteps, *prate, *addrp, steps; - struct device_node *parent; + host = kzalloc(sizeof(struct pmac_i2c_host_kw), GFP_KERNEL); if (host == NULL) { printk(KERN_ERR "low_i2c: Can't allocate host for %s\n", np->full_name); - return; + return NULL; } - memset(host, 0, sizeof(*host)); /* Apple is kind enough to provide a valid AAPL,address property * on all i2c keywest nodes so far ... we would have to fallback @@ -360,18 +405,14 @@ static void keywest_low_i2c_add(struct device_node *np) if (addrp == NULL) { printk(KERN_ERR "low_i2c: Can't find address for %s\n", np->full_name); - return; + kfree(host); + return NULL; } init_MUTEX(&host->mutex); - host->np = of_node_get(np); psteps = (u32 *)get_property(np, "AAPL,address-step", NULL); steps = psteps ? (*psteps) : 0x10; for (host->bsteps = 0; (steps & 0x01) == 0; host->bsteps++) steps >>= 1; - parent = of_get_parent(np); - host->num_channels = 1; - if (parent && parent->name[0] == 'u') - host->num_channels = 2; /* Select interface rate */ host->speed = KW_I2C_MODE_25KHZ; prate = (u32 *)get_property(np, "AAPL,i2c-rate", NULL); @@ -387,148 +428,620 @@ static void keywest_low_i2c_add(struct device_node *np) break; } - printk(KERN_INFO "low_i2c: Bus %s found at 0x%08x, %d channels," - " speed = %d KHz\n", - np->full_name, *addrp, host->num_channels, prate ? *prate : 25); - - host->mode = pmac_low_i2c_mode_std; + printk(KERN_INFO "KeyWest i2c @0x%08x %s\n", *addrp, np->full_name); host->base = ioremap((*addrp), 0x1000); - host->func = keywest_low_i2c_func; + + return host; } + +static void __init kw_i2c_add(struct pmac_i2c_host_kw *host, + struct device_node *controller, + struct device_node *busnode, + int channel) +{ + struct pmac_i2c_bus *bus; + + bus = kzalloc(sizeof(struct pmac_i2c_bus), GFP_KERNEL); + if (bus == NULL) + return; + + bus->controller = of_node_get(controller); + bus->busnode = of_node_get(busnode); + bus->type = pmac_i2c_bus_keywest; + bus->hostdata = host; + bus->channel = channel; + bus->mode = pmac_i2c_mode_std; + bus->open = kw_i2c_open; + bus->close = kw_i2c_close; + bus->xfer = kw_i2c_xfer; + init_MUTEX(&bus->sem); + if (controller == busnode) + bus->flags = pmac_i2c_multibus; + list_add(&bus->link, &pmac_i2c_busses); + + printk(KERN_INFO " channel %d bus %s\n", channel, + (controller == busnode) ? "<multibus>" : busnode->full_name); +} + +static void __init kw_i2c_probe(void) +{ + struct device_node *np, *child, *parent; + + /* Probe keywest-i2c busses */ + for (np = NULL; + (np = of_find_compatible_node(np, "i2c","keywest-i2c")) != NULL;){ + struct pmac_i2c_host_kw *host; + int multibus, chans, i; + + /* Found one, init a host structure */ + host = kw_i2c_host_init(np); + if (host == NULL) + continue; + + /* Now check if we have a multibus setup (old style) or if we + * have proper bus nodes. Note that the "new" way (proper bus + * nodes) might cause us to not create some busses that are + * kept hidden in the device-tree. In the future, we might + * want to work around that by creating busses without a node + * but not for now + */ + child = of_get_next_child(np, NULL); + multibus = !child || strcmp(child->name, "i2c-bus"); + of_node_put(child); + + /* For a multibus setup, we get the bus count based on the + * parent type + */ + if (multibus) { + parent = of_get_parent(np); + if (parent == NULL) + continue; + chans = parent->name[0] == 'u' ? 2 : 1; + for (i = 0; i < chans; i++) + kw_i2c_add(host, np, np, i); + } else { + for (child = NULL; + (child = of_get_next_child(np, child)) != NULL;) { + u32 *reg = + (u32 *)get_property(child, "reg", NULL); + if (reg == NULL) + continue; + kw_i2c_add(host, np, child, *reg); + } + } + } +} + + /* * * PMU implementation * */ - #ifdef CONFIG_ADB_PMU -static int pmu_low_i2c_func(struct low_i2c_host *host, u8 addr, u8 sub, u8 *data, int len) +/* + * i2c command block to the PMU + */ +struct pmu_i2c_hdr { + u8 bus; + u8 mode; + u8 bus2; + u8 address; + u8 sub_addr; + u8 comb_addr; + u8 count; + u8 data[]; +}; + +static void pmu_i2c_complete(struct adb_request *req) { - // TODO - return -ENODEV; + complete(req->arg); } -static void pmu_low_i2c_add(struct device_node *np) +static int pmu_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, + u32 subaddr, u8 *data, int len) { - struct low_i2c_host *host = find_low_i2c_host(NULL); + struct adb_request *req = bus->hostdata; + struct pmu_i2c_hdr *hdr = (struct pmu_i2c_hdr *)&req->data[1]; + struct completion comp; + int read = addrdir & 1; + int retry; + int rc = 0; - if (host == NULL) { - printk(KERN_ERR "low_i2c: Can't allocate host for %s\n", - np->full_name); - return; + /* For now, limit ourselves to 16 bytes transfers */ + if (len > 16) + return -EINVAL; + + init_completion(&comp); + + for (retry = 0; retry < 16; retry++) { + memset(req, 0, sizeof(struct adb_request)); + hdr->bus = bus->channel; + hdr->count = len; + + switch(bus->mode) { + case pmac_i2c_mode_std: + if (subsize != 0) + return -EINVAL; + hdr->address = addrdir; + hdr->mode = PMU_I2C_MODE_SIMPLE; + break; + case pmac_i2c_mode_stdsub: + case pmac_i2c_mode_combined: + if (subsize != 1) + return -EINVAL; + hdr->address = addrdir & 0xfe; + hdr->comb_addr = addrdir; + hdr->sub_addr = subaddr; + if (bus->mode == pmac_i2c_mode_stdsub) + hdr->mode = PMU_I2C_MODE_STDSUB; + else + hdr->mode = PMU_I2C_MODE_COMBINED; + break; + default: + return -EINVAL; + } + + INIT_COMPLETION(comp); + req->data[0] = PMU_I2C_CMD; + req->reply[0] = 0xff; + req->nbytes = sizeof(struct pmu_i2c_hdr) + 1; + req->done = pmu_i2c_complete; + req->arg = ∁ + if (!read) { + memcpy(hdr->data, data, len); + req->nbytes += len; + } + rc = pmu_queue_request(req); + if (rc) + return rc; + wait_for_completion(&comp); + if (req->reply[0] == PMU_I2C_STATUS_OK) + break; + msleep(15); } - memset(host, 0, sizeof(*host)); + if (req->reply[0] != PMU_I2C_STATUS_OK) + return -EIO; - init_MUTEX(&host->mutex); - host->np = of_node_get(np); - host->num_channels = 3; - host->mode = pmac_low_i2c_mode_std; - host->func = pmu_low_i2c_func; + for (retry = 0; retry < 16; retry++) { + memset(req, 0, sizeof(struct adb_request)); + + /* I know that looks like a lot, slow as hell, but darwin + * does it so let's be on the safe side for now + */ + msleep(15); + + hdr->bus = PMU_I2C_BUS_STATUS; + + INIT_COMPLETION(comp); + req->data[0] = PMU_I2C_CMD; + req->reply[0] = 0xff; + req->nbytes = 2; + req->done = pmu_i2c_complete; + req->arg = ∁ + rc = pmu_queue_request(req); + if (rc) + return rc; + wait_for_completion(&comp); + + if (req->reply[0] == PMU_I2C_STATUS_OK && !read) + return 0; + if (req->reply[0] == PMU_I2C_STATUS_DATAREAD && read) { + int rlen = req->reply_len - 1; + + if (rlen != len) { + printk(KERN_WARNING "low_i2c: PMU returned %d" + " bytes, expected %d !\n", rlen, len); + return -EIO; + } + memcpy(data, &req->reply[1], len); + return 0; + } + } + return -EIO; +} + +static void __init pmu_i2c_probe(void) +{ + struct pmac_i2c_bus *bus; + struct device_node *busnode; + int channel, sz; + + if (!pmu_present()) + return; + + /* There might or might not be a "pmu-i2c" node, we use that + * or via-pmu itself, whatever we find. I haven't seen a machine + * with separate bus nodes, so we assume a multibus setup + */ + busnode = of_find_node_by_name(NULL, "pmu-i2c"); + if (busnode == NULL) + busnode = of_find_node_by_name(NULL, "via-pmu"); + if (busnode == NULL) + return; + + printk(KERN_INFO "PMU i2c %s\n", busnode->full_name); + + /* + * We add bus 1 and 2 only for now, bus 0 is "special" + */ + for (channel = 1; channel <= 2; channel++) { + sz = sizeof(struct pmac_i2c_bus) + sizeof(struct adb_request); + bus = kzalloc(sz, GFP_KERNEL); + if (bus == NULL) + return; + + bus->controller = busnode; + bus->busnode = busnode; + bus->type = pmac_i2c_bus_pmu; + bus->channel = channel; + bus->mode = pmac_i2c_mode_std; + bus->hostdata = bus + 1; + bus->xfer = pmu_i2c_xfer; + init_MUTEX(&bus->sem); + bus->flags = pmac_i2c_multibus; + list_add(&bus->link, &pmac_i2c_busses); + + printk(KERN_INFO " channel %d bus <multibus>\n", channel); + } } #endif /* CONFIG_ADB_PMU */ -void __init pmac_init_low_i2c(void) + +/* + * + * SMU implementation + * + */ + +#ifdef CONFIG_PMAC_SMU + +static void smu_i2c_complete(struct smu_i2c_cmd *cmd, void *misc) { - struct device_node *np; + complete(misc); +} - /* Probe keywest-i2c busses */ - np = of_find_compatible_node(NULL, "i2c", "keywest-i2c"); - while(np) { - keywest_low_i2c_add(np); - np = of_find_compatible_node(np, "i2c", "keywest-i2c"); +static int smu_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, + u32 subaddr, u8 *data, int len) +{ + struct smu_i2c_cmd *cmd = bus->hostdata; + struct completion comp; + int read = addrdir & 1; + int rc = 0; + + memset(cmd, 0, sizeof(struct smu_i2c_cmd)); + cmd->info.bus = bus->channel; + cmd->info.devaddr = addrdir; + cmd->info.datalen = len; + + switch(bus->mode) { + case pmac_i2c_mode_std: + if (subsize != 0) + return -EINVAL; + cmd->info.type = SMU_I2C_TRANSFER_SIMPLE; + break; + case pmac_i2c_mode_stdsub: + case pmac_i2c_mode_combined: + if (subsize > 3 || subsize < 1) + return -EINVAL; + cmd->info.sublen = subsize; + /* that's big-endian only but heh ! */ + memcpy(&cmd->info.subaddr, ((char *)&subaddr) + (4 - subsize), + subsize); + if (bus->mode == pmac_i2c_mode_stdsub) + cmd->info.type = SMU_I2C_TRANSFER_STDSUB; + else + cmd->info.type = SMU_I2C_TRANSFER_COMBINED; + break; + default: + return -EINVAL; } + if (!read) + memcpy(cmd->info.data, data, len); + + init_completion(&comp); + cmd->done = smu_i2c_complete; + cmd->misc = ∁ + rc = smu_queue_i2c(cmd); + if (rc < 0) + return rc; + wait_for_completion(&comp); + rc = cmd->status; + + if (read) + memcpy(data, cmd->info.data, len); + return rc < 0 ? rc : 0; +} -#ifdef CONFIG_ADB_PMU - /* Probe PMU busses */ - np = of_find_node_by_name(NULL, "via-pmu"); - if (np) - pmu_low_i2c_add(np); -#endif /* CONFIG_ADB_PMU */ +static void __init smu_i2c_probe(void) +{ + struct device_node *controller, *busnode; + struct pmac_i2c_bus *bus; + u32 *reg; + int sz; + + if (!smu_present()) + return; + + controller = of_find_node_by_name(NULL, "smu_i2c_control"); + if (controller == NULL) + controller = of_find_node_by_name(NULL, "smu"); + if (controller == NULL) + return; + + printk(KERN_INFO "SMU i2c %s\n", controller->full_name); + + /* Look for childs, note that they might not be of the right + * type as older device trees mix i2c busses and other thigns + * at the same level + */ + for (busnode = NULL; + (busnode = of_get_next_child(controller, busnode)) != NULL;) { + if (strcmp(busnode->type, "i2c") && + strcmp(busnode->type, "i2c-bus")) + continue; + reg = (u32 *)get_property(busnode, "reg", NULL); + if (reg == NULL) + continue; + + sz = sizeof(struct pmac_i2c_bus) + sizeof(struct smu_i2c_cmd); + bus = kzalloc(sz, GFP_KERNEL); + if (bus == NULL) + return; + + bus->controller = controller; + bus->busnode = of_node_get(busnode); + bus->type = pmac_i2c_bus_smu; + bus->channel = *reg; + bus->mode = pmac_i2c_mode_std; + bus->hostdata = bus + 1; + bus->xfer = smu_i2c_xfer; + init_MUTEX(&bus->sem); + bus->flags = 0; + list_add(&bus->link, &pmac_i2c_busses); + + printk(KERN_INFO " channel %x bus %s\n", + bus->channel, busnode->full_name); + } +} + +#endif /* CONFIG_PMAC_SMU */ + +/* + * + * Core code + * + */ + + +struct pmac_i2c_bus *pmac_i2c_find_bus(struct device_node *node) +{ + struct device_node *p = of_node_get(node); + struct device_node *prev = NULL; + struct pmac_i2c_bus *bus; + + while(p) { + list_for_each_entry(bus, &pmac_i2c_busses, link) { + if (p == bus->busnode) { + if (prev && bus->flags & pmac_i2c_multibus) { + u32 *reg; + reg = (u32 *)get_property(prev, "reg", + NULL); + if (!reg) + continue; + if (((*reg) >> 8) != bus->channel) + continue; + } + of_node_put(p); + of_node_put(prev); + return bus; + } + } + of_node_put(prev); + prev = p; + p = of_get_parent(p); + } + return NULL; +} +EXPORT_SYMBOL_GPL(pmac_i2c_find_bus); + +u8 pmac_i2c_get_dev_addr(struct device_node *device) +{ + u32 *reg = (u32 *)get_property(device, "reg", NULL); + + if (reg == NULL) + return 0; + + return (*reg) & 0xff; +} +EXPORT_SYMBOL_GPL(pmac_i2c_get_dev_addr); + +struct device_node *pmac_i2c_get_controller(struct pmac_i2c_bus *bus) +{ + return bus->controller; +} +EXPORT_SYMBOL_GPL(pmac_i2c_get_controller); + +struct device_node *pmac_i2c_get_bus_node(struct pmac_i2c_bus *bus) +{ + return bus->busnode; +} +EXPORT_SYMBOL_GPL(pmac_i2c_get_bus_node); + +int pmac_i2c_get_type(struct pmac_i2c_bus *bus) +{ + return bus->type; +} +EXPORT_SYMBOL_GPL(pmac_i2c_get_type); + +int pmac_i2c_get_flags(struct pmac_i2c_bus *bus) +{ + return bus->flags; +} +EXPORT_SYMBOL_GPL(pmac_i2c_get_flags); - /* TODO: Add CUDA support as well */ +void pmac_i2c_attach_adapter(struct pmac_i2c_bus *bus, + struct i2c_adapter *adapter) +{ + WARN_ON(bus->adapter != NULL); + bus->adapter = adapter; } +EXPORT_SYMBOL_GPL(pmac_i2c_attach_adapter); + +void pmac_i2c_detach_adapter(struct pmac_i2c_bus *bus, + struct i2c_adapter *adapter) +{ + WARN_ON(bus->adapter != adapter); + bus->adapter = NULL; +} +EXPORT_SYMBOL_GPL(pmac_i2c_detach_adapter); + +struct i2c_adapter *pmac_i2c_get_adapter(struct pmac_i2c_bus *bus) +{ + return bus->adapter; +} +EXPORT_SYMBOL_GPL(pmac_i2c_get_adapter); + +extern int pmac_i2c_match_adapter(struct device_node *dev, + struct i2c_adapter *adapter) +{ + struct pmac_i2c_bus *bus = pmac_i2c_find_bus(dev); + + if (bus == NULL) + return 0; + return (bus->adapter == adapter); +} +EXPORT_SYMBOL_GPL(pmac_i2c_match_adapter); int pmac_low_i2c_lock(struct device_node *np) { - struct low_i2c_host *host = find_low_i2c_host(np); + struct pmac_i2c_bus *bus, *found = NULL; - if (!host) + list_for_each_entry(bus, &pmac_i2c_busses, link) { + if (np == bus->controller) { + found = bus; + break; + } + } + if (!found) return -ENODEV; - down(&host->mutex); - return 0; + return pmac_i2c_open(bus, 0); } -EXPORT_SYMBOL(pmac_low_i2c_lock); +EXPORT_SYMBOL_GPL(pmac_low_i2c_lock); int pmac_low_i2c_unlock(struct device_node *np) { - struct low_i2c_host *host = find_low_i2c_host(np); + struct pmac_i2c_bus *bus, *found = NULL; - if (!host) + list_for_each_entry(bus, &pmac_i2c_busses, link) { + if (np == bus->controller) { + found = bus; + break; + } + } + if (!found) return -ENODEV; - up(&host->mutex); + pmac_i2c_close(bus); return 0; } -EXPORT_SYMBOL(pmac_low_i2c_unlock); +EXPORT_SYMBOL_GPL(pmac_low_i2c_unlock); -int pmac_low_i2c_open(struct device_node *np, int channel) +int pmac_i2c_open(struct pmac_i2c_bus *bus, int polled) { - struct low_i2c_host *host = find_low_i2c_host(np); + int rc; + + down(&bus->sem); + bus->polled = polled; + bus->opened = 1; + bus->mode = pmac_i2c_mode_std; + if (bus->open && (rc = bus->open(bus)) != 0) { + bus->opened = 0; + up(&bus->sem); + return rc; + } + return 0; +} +EXPORT_SYMBOL_GPL(pmac_i2c_open); - if (!host) - return -ENODEV; +void pmac_i2c_close(struct pmac_i2c_bus *bus) +{ + WARN_ON(!bus->opened); + if (bus->close) + bus->close(bus); + bus->opened = 0; + up(&bus->sem); +} +EXPORT_SYMBOL_GPL(pmac_i2c_close); - if (channel >= host->num_channels) - return -EINVAL; +int pmac_i2c_setmode(struct pmac_i2c_bus *bus, int mode) +{ + WARN_ON(!bus->opened); - down(&host->mutex); - host->is_open = 1; - host->channel = channel; + /* Report me if you see the error below as there might be a new + * "combined4" mode that I need to implement for the SMU bus + */ + if (mode < pmac_i2c_mode_dumb || mode > pmac_i2c_mode_combined) { + printk(KERN_ERR "low_i2c: Invalid mode %d requested on" + " bus %s !\n", mode, bus->busnode->full_name); + return -EINVAL; + } + bus->mode = mode; return 0; } -EXPORT_SYMBOL(pmac_low_i2c_open); +EXPORT_SYMBOL_GPL(pmac_i2c_setmode); -int pmac_low_i2c_close(struct device_node *np) +int pmac_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, + u32 subaddr, u8 *data, int len) { - struct low_i2c_host *host = find_low_i2c_host(np); + int rc; - if (!host) - return -ENODEV; + WARN_ON(!bus->opened); - host->is_open = 0; - up(&host->mutex); + DBG("xfer() chan=%d, addrdir=0x%x, mode=%d, subsize=%d, subaddr=0x%x," + " %d bytes, bus %s\n", bus->channel, addrdir, bus->mode, subsize, + subaddr, len, bus->busnode->full_name); - return 0; + rc = bus->xfer(bus, addrdir, subsize, subaddr, data, len); + +#ifdef DEBUG + if (rc) + DBG("xfer error %d\n", rc); +#endif + return rc; } -EXPORT_SYMBOL(pmac_low_i2c_close); +EXPORT_SYMBOL_GPL(pmac_i2c_xfer); -int pmac_low_i2c_setmode(struct device_node *np, int mode) +/* + * Initialize us: probe all i2c busses on the machine and instantiate + * busses. + */ +/* This is non-static as it might be called early by smp code */ +int __init pmac_i2c_init(void) { - struct low_i2c_host *host = find_low_i2c_host(np); + static int i2c_inited; - if (!host) - return -ENODEV; - WARN_ON(!host->is_open); - host->mode = mode; + if (i2c_inited) + return 0; + i2c_inited = 1; - return 0; -} -EXPORT_SYMBOL(pmac_low_i2c_setmode); + /* Probe keywest-i2c busses */ + kw_i2c_probe(); -int pmac_low_i2c_xfer(struct device_node *np, u8 addrdir, u8 subaddr, u8 *data, int len) -{ - struct low_i2c_host *host = find_low_i2c_host(np); +#ifdef CONFIG_ADB_PMU + pmu_i2c_probe(); +#endif - if (!host) - return -ENODEV; - WARN_ON(!host->is_open); +#ifdef CONFIG_PMAC_SMU + smu_i2c_probe(); +#endif - return host->func(host, addrdir, subaddr, data, len); + return 0; } -EXPORT_SYMBOL(pmac_low_i2c_xfer); +arch_initcall(pmac_i2c_init); diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c index e5a5bdb..dc5cdc1 100644 --- a/arch/powerpc/platforms/powermac/setup.c +++ b/arch/powerpc/platforms/powermac/setup.c @@ -652,27 +652,22 @@ static int __init pmac_declare_of_platform_devices(void) { struct device_node *np, *npp; - np = find_devices("uni-n"); - if (np) { - for (np = np->child; np != NULL; np = np->sibling) - if (strncmp(np->name, "i2c", 3) == 0) { - of_platform_device_create(np, "uni-n-i2c", - NULL); - break; - } - } - np = find_devices("valkyrie"); + np = of_find_node_by_name(NULL, "valkyrie"); if (np) of_platform_device_create(np, "valkyrie", NULL); - np = find_devices("platinum"); + np = of_find_node_by_name(NULL, "platinum"); if (np) of_platform_device_create(np, "platinum", NULL); - - npp = of_find_node_by_name(NULL, "u3"); + npp = of_find_node_by_name(NULL, "uni-n"); + if (npp == NULL) + npp = of_find_node_by_name(NULL, "u3"); + if (npp == NULL) + npp = of_find_node_by_name(NULL, "u4"); if (npp) { for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) { if (strncmp(np->name, "i2c", 3) == 0) { - of_platform_device_create(np, "u3-i2c", NULL); + of_platform_device_create(np, "uni-n-i2c", + NULL); of_node_put(np); break; } diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c index df01bb8..ab72ba8 100644 --- a/arch/powerpc/platforms/powermac/smp.c +++ b/arch/powerpc/platforms/powermac/smp.c @@ -482,7 +482,7 @@ static void __devinit smp_core99_take_timebase(void) /* * G5s enable/disable the timebase via an i2c-connected clock chip. */ -static struct device_node *pmac_tb_clock_chip_host; +static struct pmac_i2c_bus *pmac_tb_clock_chip_host; static u8 pmac_tb_pulsar_addr; static void smp_core99_cypress_tb_freeze(int freeze) @@ -493,20 +493,20 @@ static void smp_core99_cypress_tb_freeze(int freeze) /* Strangely, the device-tree says address is 0xd2, but darwin * accesses 0xd0 ... */ - pmac_low_i2c_setmode(pmac_tb_clock_chip_host, - pmac_low_i2c_mode_combined); - rc = pmac_low_i2c_xfer(pmac_tb_clock_chip_host, - 0xd0 | pmac_low_i2c_read, - 0x81, &data, 1); + pmac_i2c_setmode(pmac_tb_clock_chip_host, + pmac_i2c_mode_combined); + rc = pmac_i2c_xfer(pmac_tb_clock_chip_host, + 0xd0 | pmac_i2c_read, + 1, 0x81, &data, 1); if (rc != 0) goto bail; data = (data & 0xf3) | (freeze ? 0x00 : 0x0c); - pmac_low_i2c_setmode(pmac_tb_clock_chip_host, pmac_low_i2c_mode_stdsub); - rc = pmac_low_i2c_xfer(pmac_tb_clock_chip_host, - 0xd0 | pmac_low_i2c_write, - 0x81, &data, 1); + pmac_i2c_setmode(pmac_tb_clock_chip_host, pmac_i2c_mode_stdsub); + rc = pmac_i2c_xfer(pmac_tb_clock_chip_host, + 0xd0 | pmac_i2c_write, + 1, 0x81, &data, 1); bail: if (rc != 0) { @@ -522,20 +522,20 @@ static void smp_core99_pulsar_tb_freeze(int freeze) u8 data; int rc; - pmac_low_i2c_setmode(pmac_tb_clock_chip_host, - pmac_low_i2c_mode_combined); - rc = pmac_low_i2c_xfer(pmac_tb_clock_chip_host, - pmac_tb_pulsar_addr | pmac_low_i2c_read, - 0x2e, &data, 1); + pmac_i2c_setmode(pmac_tb_clock_chip_host, + pmac_i2c_mode_combined); + rc = pmac_i2c_xfer(pmac_tb_clock_chip_host, + pmac_tb_pulsar_addr | pmac_i2c_read, + 1, 0x2e, &data, 1); if (rc != 0) goto bail; data = (data & 0x88) | (freeze ? 0x11 : 0x22); - pmac_low_i2c_setmode(pmac_tb_clock_chip_host, pmac_low_i2c_mode_stdsub); - rc = pmac_low_i2c_xfer(pmac_tb_clock_chip_host, - pmac_tb_pulsar_addr | pmac_low_i2c_write, - 0x2e, &data, 1); + pmac_i2c_setmode(pmac_tb_clock_chip_host, pmac_i2c_mode_stdsub); + rc = pmac_i2c_xfer(pmac_tb_clock_chip_host, + pmac_tb_pulsar_addr | pmac_i2c_write, + 1, 0x2e, &data, 1); bail: if (rc != 0) { printk(KERN_ERR "Pulsar Timebase %s rc: %d\n", @@ -560,13 +560,15 @@ static void __init smp_core99_setup_i2c_hwsync(int ncpus) if (!ok) continue; + pmac_tb_clock_chip_host = pmac_i2c_find_bus(cc); + if (pmac_tb_clock_chip_host == NULL) + continue; reg = (u32 *)get_property(cc, "reg", NULL); if (reg == NULL) continue; - switch (*reg) { case 0xd2: - if (device_is_compatible(cc, "pulsar-legacy-slewing")) { + if (device_is_compatible(cc,"pulsar-legacy-slewing")) { pmac_tb_freeze = smp_core99_pulsar_tb_freeze; pmac_tb_pulsar_addr = 0xd2; name = "Pulsar"; @@ -585,30 +587,19 @@ static void __init smp_core99_setup_i2c_hwsync(int ncpus) break; } if (pmac_tb_freeze != NULL) { - struct device_node *p = of_get_parent(cc); - of_node_put(cc); - while(p && strcmp(p->type, "i2c")) { - cc = of_get_parent(p); - of_node_put(p); - p = cc; - } - if (p == NULL) - goto no_i2c_sync; /* Open i2c bus for synchronous access */ - if (pmac_low_i2c_open(p, 0)) { - printk(KERN_ERR "Failed top open i2c bus %s for clock" - " sync, fallback to software sync !\n", - p->full_name); - of_node_put(p); + if (pmac_i2c_open(pmac_tb_clock_chip_host, 1)) { + printk(KERN_ERR "Failed top open i2c bus for clock" + " sync, fallback to software sync !\n"); goto no_i2c_sync; } - pmac_tb_clock_chip_host = p; printk(KERN_INFO "Processor timebase sync using %s i2c clock\n", name); return; } no_i2c_sync: pmac_tb_freeze = NULL; + pmac_tb_clock_chip_host = NULL; } #endif /* CONFIG_PPC64 */ @@ -752,8 +743,18 @@ static int __init smp_core99_probe(void) if (ncpus <= 1) return 1; + /* We need to perform some early initialisations before we can start + * setting up SMP as we are running before initcalls + */ + pmac_i2c_init(); + + /* Setup various bits like timebase sync method, ability to nap, ... */ smp_core99_setup(ncpus); + + /* Install IPIs */ mpic_request_ipis(); + + /* Collect l2cr and l3cr values from CPU 0 */ core99_init_caches(0); return ncpus; @@ -817,7 +818,7 @@ static void __devinit smp_core99_setup_cpu(int cpu_nr) /* Close i2c bus if it was used for tb sync */ if (pmac_tb_clock_chip_host) { - pmac_low_i2c_close(pmac_tb_clock_chip_host); + pmac_i2c_close(pmac_tb_clock_chip_host); pmac_tb_clock_chip_host = NULL; } |
