diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/i2c/base.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/i2c/base.c | 547 |
1 files changed, 280 insertions, 267 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c b/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c index 740e399bc7ab..3d2c88310f98 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c @@ -1,5 +1,5 @@ /* - * Copyright 2009 Red Hat Inc. + * Copyright 2012 Red Hat Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -22,204 +22,277 @@ * Authors: Ben Skeggs */ -#include <linux/module.h> +#include "core/option.h" -#include "drmP.h" -#include "nouveau_drv.h" -#include <subdev/i2c.h> -#include "nouveau_hw.h" +#include "subdev/i2c.h" +#include "subdev/vga.h" -static void -i2c_drive_scl(void *data, int state) +int +nv_rdi2cr(struct nouveau_i2c_port *port, u8 addr, u8 reg) +{ + u8 val; + struct i2c_msg msgs[] = { + { .addr = addr, .flags = 0, .len = 1, .buf = ® }, + { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val }, + }; + + int ret = i2c_transfer(&port->adapter, msgs, 2); + if (ret != 2) + return -EIO; + + return val; +} + +int +nv_wri2cr(struct nouveau_i2c_port *port, u8 addr, u8 reg, u8 val) +{ + struct i2c_msg msgs[] = { + { .addr = addr, .flags = 0, .len = 1, .buf = ® }, + { .addr = addr, .flags = 0, .len = 1, .buf = &val }, + }; + + int ret = i2c_transfer(&port->adapter, msgs, 2); + if (ret != 2) + return -EIO; + + return 0; +} + +bool +nv_probe_i2c(struct nouveau_i2c_port *port, u8 addr) +{ + u8 buf[] = { 0 }; + struct i2c_msg msgs[] = { + { + .addr = addr, + .flags = 0, + .len = 1, + .buf = buf, + }, + { + .addr = addr, + .flags = I2C_M_RD, + .len = 1, + .buf = buf, + } + }; + + return i2c_transfer(&port->adapter, msgs, 2) == 2; +} + +static struct nouveau_i2c_port * +nouveau_i2c_find(struct nouveau_i2c *i2c, u8 index) +{ + struct nouveau_bios *bios = nouveau_bios(i2c); + struct nouveau_i2c_port *port; + + if (index == NV_I2C_DEFAULT(0) || + index == NV_I2C_DEFAULT(1)) { + u8 ver, hdr, cnt, len; + u16 i2c = dcb_i2c_table(bios, &ver, &hdr, &cnt, &len); + if (i2c && ver >= 0x30) { + u8 auxidx = nv_ro08(bios, i2c + 4); + if (index == NV_I2C_DEFAULT(0)) + index = (auxidx & 0x0f) >> 0; + else + index = (auxidx & 0xf0) >> 4; + } else { + index = 2; + } + } + + list_for_each_entry(port, &i2c->ports, head) { + if (port->index == index) + break; + } + + if (&port->head == &i2c->ports) + return NULL; + + if (nv_device(i2c)->card_type >= NV_50 && (port->dcb & 0x00000100)) { + u32 reg = 0x00e500, val; + if (port->type == 6) { + reg += port->drive * 0x50; + val = 0x2002; + } else { + reg += ((port->dcb & 0x1e00) >> 9) * 0x50; + val = 0xe001; + } + + /* nfi, but neither auxch or i2c work if it's 1 */ + nv_mask(i2c, reg + 0x0c, 0x00000001, 0x00000000); + /* nfi, but switches auxch vs normal i2c */ + nv_mask(i2c, reg + 0x00, 0x0000f003, val); + } + + return port; +} + +static int +nouveau_i2c_identify(struct nouveau_i2c *i2c, int index, const char *what, + struct i2c_board_info *info, + bool (*match)(struct nouveau_i2c_port *, + struct i2c_board_info *)) { - struct nouveau_i2c_chan *port = data; - if (port->type == 0) { - u8 val = NVReadVgaCrtc(port->dev, 0, port->drive); + struct nouveau_i2c_port *port = nouveau_i2c_find(i2c, index); + int i; + + if (!port) { + nv_debug(i2c, "no bus when probing %s on %d\n", what, index); + return -ENODEV; + } + + nv_debug(i2c, "probing %ss on bus: %d\n", what, port->index); + for (i = 0; info[i].addr; i++) { + if (nv_probe_i2c(port, info[i].addr) && + (!match || match(port, &info[i]))) { + nv_info(i2c, "detected %s: %s\n", what, info[i].type); + return i; + } + } + + nv_debug(i2c, "no devices found.\n"); + return -ENODEV; +} + +void +nouveau_i2c_drive_scl(void *data, int state) +{ + struct nouveau_i2c_port *port = data; + + if (port->type == DCB_I2C_NV04_BIT) { + u8 val = nv_rdvgac(port->i2c, 0, port->drive); if (state) val |= 0x20; else val &= 0xdf; - NVWriteVgaCrtc(port->dev, 0, port->drive, val | 0x01); + nv_wrvgac(port->i2c, 0, port->drive, val | 0x01); } else - if (port->type == 4) { - nv_mask(port->dev, port->drive, 0x2f, state ? 0x21 : 0x01); + if (port->type == DCB_I2C_NV4E_BIT) { + nv_mask(port->i2c, port->drive, 0x2f, state ? 0x21 : 0x01); } else - if (port->type == 5) { + if (port->type == DCB_I2C_NVIO_BIT) { if (state) port->state |= 0x01; else port->state &= 0xfe; - nv_wr32(port->dev, port->drive, 4 | port->state); + nv_wr32(port->i2c, port->drive, 4 | port->state); } } -static void -i2c_drive_sda(void *data, int state) +void +nouveau_i2c_drive_sda(void *data, int state) { - struct nouveau_i2c_chan *port = data; - if (port->type == 0) { - u8 val = NVReadVgaCrtc(port->dev, 0, port->drive); + struct nouveau_i2c_port *port = data; + + if (port->type == DCB_I2C_NV04_BIT) { + u8 val = nv_rdvgac(port->i2c, 0, port->drive); if (state) val |= 0x10; else val &= 0xef; - NVWriteVgaCrtc(port->dev, 0, port->drive, val | 0x01); + nv_wrvgac(port->i2c, 0, port->drive, val | 0x01); } else - if (port->type == 4) { - nv_mask(port->dev, port->drive, 0x1f, state ? 0x11 : 0x01); + if (port->type == DCB_I2C_NV4E_BIT) { + nv_mask(port->i2c, port->drive, 0x1f, state ? 0x11 : 0x01); } else - if (port->type == 5) { + if (port->type == DCB_I2C_NVIO_BIT) { if (state) port->state |= 0x02; else port->state &= 0xfd; - nv_wr32(port->dev, port->drive, 4 | port->state); + nv_wr32(port->i2c, port->drive, 4 | port->state); } } -static int -i2c_sense_scl(void *data) +int +nouveau_i2c_sense_scl(void *data) { - struct nouveau_i2c_chan *port = data; - struct drm_nouveau_private *dev_priv = port->dev->dev_private; - if (port->type == 0) { - return !!(NVReadVgaCrtc(port->dev, 0, port->sense) & 0x04); + struct nouveau_i2c_port *port = data; + struct nouveau_device *device = nv_device(port->i2c); + + if (port->type == DCB_I2C_NV04_BIT) { + return !!(nv_rdvgac(port->i2c, 0, port->sense) & 0x04); } else - if (port->type == 4) { - return !!(nv_rd32(port->dev, port->sense) & 0x00040000); + if (port->type == DCB_I2C_NV4E_BIT) { + return !!(nv_rd32(port->i2c, port->sense) & 0x00040000); } else - if (port->type == 5) { - if (dev_priv->card_type < NV_D0) - return !!(nv_rd32(port->dev, port->sense) & 0x01); + if (port->type == DCB_I2C_NVIO_BIT) { + if (device->card_type < NV_D0) + return !!(nv_rd32(port->i2c, port->sense) & 0x01); else - return !!(nv_rd32(port->dev, port->sense) & 0x10); + return !!(nv_rd32(port->i2c, port->sense) & 0x10); } + return 0; } -static int -i2c_sense_sda(void *data) +int +nouveau_i2c_sense_sda(void *data) { - struct nouveau_i2c_chan *port = data; - struct drm_nouveau_private *dev_priv = port->dev->dev_private; - if (port->type == 0) { - return !!(NVReadVgaCrtc(port->dev, 0, port->sense) & 0x08); + struct nouveau_i2c_port *port = data; + struct nouveau_device *device = nv_device(port->i2c); + + if (port->type == DCB_I2C_NV04_BIT) { + return !!(nv_rdvgac(port->i2c, 0, port->sense) & 0x08); } else - if (port->type == 4) { - return !!(nv_rd32(port->dev, port->sense) & 0x00080000); + if (port->type == DCB_I2C_NV4E_BIT) { + return !!(nv_rd32(port->i2c, port->sense) & 0x00080000); } else - if (port->type == 5) { - if (dev_priv->card_type < NV_D0) - return !!(nv_rd32(port->dev, port->sense) & 0x02); + if (port->type == DCB_I2C_NVIO_BIT) { + if (device->card_type < NV_D0) + return !!(nv_rd32(port->i2c, port->sense) & 0x02); else - return !!(nv_rd32(port->dev, port->sense) & 0x20); + return !!(nv_rd32(port->i2c, port->sense) & 0x20); } + return 0; } -static const uint32_t nv50_i2c_port[] = { +static const u32 nv50_i2c_port[] = { 0x00e138, 0x00e150, 0x00e168, 0x00e180, 0x00e254, 0x00e274, 0x00e764, 0x00e780, 0x00e79c, 0x00e7b8 }; -static u8 * -i2c_table(struct drm_device *dev, u8 *version) -{ - u8 *dcb = olddcb_table(dev), *i2c = NULL; - if (dcb) { - if (dcb[0] >= 0x15) - i2c = ROMPTR(dev, dcb[2]); - if (dcb[0] >= 0x30) - i2c = ROMPTR(dev, dcb[4]); - } - - /* early revisions had no version number, use dcb version */ - if (i2c) { - *version = dcb[0]; - if (*version >= 0x30) - *version = i2c[0]; - } - - return i2c; -} - -int -nouveau_i2c_init(struct drm_device *dev) +static int +nouveau_i2c_ctor(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) { - struct drm_nouveau_private *dev_priv = dev->dev_private; - struct nvbios *bios = &dev_priv->vbios; - struct nouveau_i2c_chan *port; - u8 version = 0x00, entries, recordlen; - u8 *i2c, *entry, legacy[2][4] = {}; - int ret, i; - - INIT_LIST_HEAD(&dev_priv->i2c_ports); - - i2c = i2c_table(dev, &version); - if (!i2c) { - u8 *bmp = &bios->data[bios->offset]; - if (bios->type != NVBIOS_BMP) - return -ENODEV; - - legacy[0][0] = NV_CIO_CRE_DDC_WR__INDEX; - legacy[0][1] = NV_CIO_CRE_DDC_STATUS__INDEX; - legacy[1][0] = NV_CIO_CRE_DDC0_WR__INDEX; - legacy[1][1] = NV_CIO_CRE_DDC0_STATUS__INDEX; - - /* BMP (from v4.0) has i2c info in the structure, it's in a - * fixed location on earlier VBIOS - */ - if (bmp[5] < 4) - i2c = &bios->data[0x48]; - else - i2c = &bmp[0x36]; - - if (i2c[4]) legacy[0][0] = i2c[4]; - if (i2c[5]) legacy[0][1] = i2c[5]; - if (i2c[6]) legacy[1][0] = i2c[6]; - if (i2c[7]) legacy[1][1] = i2c[7]; - } - - if (version >= 0x30) { - entry = i2c[1] + i2c; - entries = i2c[2]; - recordlen = i2c[3]; - } else - if (version) { - entry = i2c; - entries = 16; - recordlen = 4; - } else { - entry = legacy[0]; - entries = 2; - recordlen = 4; - } + struct nouveau_device *device = nv_device(parent); + struct nouveau_bios *bios = nouveau_bios(parent); + struct nouveau_i2c_port *port; + struct nouveau_i2c *i2c; + struct dcb_i2c_entry info; + int ret, i = -1; + + ret = nouveau_subdev_create(parent, engine, oclass, 0, + "I2C", "i2c", &i2c); + *pobject = nv_object(i2c); + if (ret) + return ret; + + i2c->find = nouveau_i2c_find; + i2c->identify = nouveau_i2c_identify; + INIT_LIST_HEAD(&i2c->ports); + + while (!dcb_i2c_parse(bios, ++i, &info)) { + if (info.type == DCB_I2C_UNUSED) + continue; - for (i = 0; i < entries; i++, entry += recordlen) { port = kzalloc(sizeof(*port), GFP_KERNEL); - if (port == NULL) { - nouveau_i2c_fini(dev); - return -ENOMEM; - } - - port->type = entry[3]; - if (version < 0x30) { - port->type &= 0x07; - if (port->type == 0x07) - port->type = 0xff; - } - - if (port->type == 0xff) { - kfree(port); - continue; + if (!port) { + nv_error(i2c, "failed port memory alloc at %d\n", i); + break; } + port->type = info.type; switch (port->type) { - case 0: /* NV04:NV50 */ - port->drive = entry[0]; - port->sense = entry[1]; + case DCB_I2C_NV04_BIT: + port->drive = info.drive; + port->sense = info.sense; break; - case 4: /* NV4E */ - port->drive = 0x600800 + entry[1]; + case DCB_I2C_NV4E_BIT: + port->drive = 0x600800 + info.drive; port->sense = port->drive; break; - case 5: /* NV50- */ - port->drive = entry[0] & 0x0f; - if (dev_priv->card_type < NV_D0) { - if (port->drive >= ARRAY_SIZE(nv50_i2c_port)) + case DCB_I2C_NVIO_BIT: + port->drive = info.drive & 0x0f; + if (device->card_type < NV_D0) { + if (info.drive >= ARRAY_SIZE(nv50_i2c_port)) break; port->drive = nv50_i2c_port[port->drive]; port->sense = port->drive; @@ -228,167 +301,107 @@ nouveau_i2c_init(struct drm_device *dev) port->sense = port->drive; } break; - case 6: /* NV50- DP AUX */ - port->drive = entry[0] & 0x0f; + case DCB_I2C_NVIO_AUX: + port->drive = info.drive & 0x0f; port->sense = port->drive; - port->adapter.algo = &nouveau_dp_i2c_algo; + port->adapter.algo = &nouveau_i2c_aux_algo; break; default: break; } if (!port->adapter.algo && !port->drive) { - NV_ERROR(dev, "I2C%d: type %d index %x/%x unknown\n", + nv_error(i2c, "I2C%d: type %d index %x/%x unknown\n", i, port->type, port->drive, port->sense); kfree(port); continue; } snprintf(port->adapter.name, sizeof(port->adapter.name), - "nouveau-%s-%d", pci_name(dev->pdev), i); + "nouveau-%s-%d", device->name, i); port->adapter.owner = THIS_MODULE; - port->adapter.dev.parent = &dev->pdev->dev; - port->dev = dev; + port->adapter.dev.parent = &device->pdev->dev; + port->i2c = i2c; port->index = i; - port->dcb = ROM32(entry[0]); + port->dcb = info.data; i2c_set_adapdata(&port->adapter, i2c); - if (port->adapter.algo != &nouveau_dp_i2c_algo) { - port->adapter.algo_data = &port->bit; - port->bit.udelay = 10; - port->bit.timeout = usecs_to_jiffies(2200); - port->bit.data = port; - port->bit.setsda = i2c_drive_sda; - port->bit.setscl = i2c_drive_scl; - port->bit.getsda = i2c_sense_sda; - port->bit.getscl = i2c_sense_scl; - - i2c_drive_scl(port, 0); - i2c_drive_sda(port, 1); - i2c_drive_scl(port, 1); - - ret = i2c_bit_add_bus(&port->adapter); + if (port->adapter.algo != &nouveau_i2c_aux_algo) { + nouveau_i2c_drive_scl(port, 0); + nouveau_i2c_drive_sda(port, 1); + nouveau_i2c_drive_scl(port, 1); + +#ifdef CONFIG_NOUVEAU_I2C_INTERNAL_DEFAULT + if (nouveau_boolopt(device->cfgopt, "NvI2C", true)) { +#else + if (nouveau_boolopt(device->cfgopt, "NvI2C", false)) { +#endif + port->adapter.algo = &nouveau_i2c_bit_algo; + ret = i2c_add_adapter(&port->adapter); + } else { + port->adapter.algo_data = &port->bit; + port->bit.udelay = 10; + port->bit.timeout = usecs_to_jiffies(2200); + port->bit.data = port; + port->bit.setsda = nouveau_i2c_drive_sda; + port->bit.setscl = nouveau_i2c_drive_scl; + port->bit.getsda = nouveau_i2c_sense_sda; + port->bit.getscl = nouveau_i2c_sense_scl; + ret = i2c_bit_add_bus(&port->adapter); + } } else { - port->adapter.algo = &nouveau_dp_i2c_algo; + port->adapter.algo = &nouveau_i2c_aux_algo; ret = i2c_add_adapter(&port->adapter); } if (ret) { - NV_ERROR(dev, "I2C%d: failed register: %d\n", i, ret); + nv_error(i2c, "I2C%d: failed register: %d\n", i, ret); kfree(port); continue; } - list_add_tail(&port->head, &dev_priv->i2c_ports); + list_add_tail(&port->head, &i2c->ports); } return 0; } -void -nouveau_i2c_fini(struct drm_device *dev) +static void +nouveau_i2c_dtor(struct nouveau_object *object) { - struct drm_nouveau_private *dev_priv = dev->dev_private; - struct nouveau_i2c_chan *port, *tmp; + struct nouveau_i2c *i2c = (void *)object; + struct nouveau_i2c_port *port, *temp; - list_for_each_entry_safe(port, tmp, &dev_priv->i2c_ports, head) { + list_for_each_entry_safe(port, temp, &i2c->ports, head) { i2c_del_adapter(&port->adapter); + list_del(&port->head); kfree(port); } -} - -struct nouveau_i2c_chan * -nouveau_i2c_find(struct drm_device *dev, u8 index) -{ - struct drm_nouveau_private *dev_priv = dev->dev_private; - struct nouveau_i2c_chan *port; - - if (index == NV_I2C_DEFAULT(0) || - index == NV_I2C_DEFAULT(1)) { - u8 version, *i2c = i2c_table(dev, &version); - if (i2c && version >= 0x30) { - if (index == NV_I2C_DEFAULT(0)) - index = (i2c[4] & 0x0f); - else - index = (i2c[4] & 0xf0) >> 4; - } else { - index = 2; - } - } - - list_for_each_entry(port, &dev_priv->i2c_ports, head) { - if (port->index == index) - break; - } - - if (&port->head == &dev_priv->i2c_ports) - return NULL; - if (dev_priv->card_type >= NV_50 && (port->dcb & 0x00000100)) { - u32 reg = 0x00e500, val; - if (port->type == 6) { - reg += port->drive * 0x50; - val = 0x2002; - } else { - reg += ((port->dcb & 0x1e00) >> 9) * 0x50; - val = 0xe001; - } - - /* nfi, but neither auxch or i2c work if it's 1 */ - nv_mask(dev, reg + 0x0c, 0x00000001, 0x00000000); - /* nfi, but switches auxch vs normal i2c */ - nv_mask(dev, reg + 0x00, 0x0000f003, val); - } - - return port; + nouveau_subdev_destroy(&i2c->base); } -bool -nouveau_probe_i2c_addr(struct nouveau_i2c_chan *i2c, int addr) +static int +nouveau_i2c_init(struct nouveau_object *object) { - uint8_t buf[] = { 0 }; - struct i2c_msg msgs[] = { - { - .addr = addr, - .flags = 0, - .len = 1, - .buf = buf, - }, - { - .addr = addr, - .flags = I2C_M_RD, - .len = 1, - .buf = buf, - } - }; - - return i2c_transfer(&i2c->adapter, msgs, 2) == 2; + struct nouveau_i2c *i2c = (void *)object; + return nouveau_subdev_init(&i2c->base); } -int -nouveau_i2c_identify(struct drm_device *dev, const char *what, - struct i2c_board_info *info, - bool (*match)(struct nouveau_i2c_chan *, - struct i2c_board_info *), - int index) +static int +nouveau_i2c_fini(struct nouveau_object *object, bool suspend) { - struct nouveau_i2c_chan *i2c = nouveau_i2c_find(dev, index); - int i; - - if (!i2c) { - NV_DEBUG(dev, "No bus when probing %s on %d\n", what, index); - return -ENODEV; - } - - NV_DEBUG(dev, "Probing %ss on I2C bus: %d\n", what, i2c->index); - for (i = 0; info[i].addr; i++) { - if (nouveau_probe_i2c_addr(i2c, info[i].addr) && - (!match || match(i2c, &info[i]))) { - NV_INFO(dev, "Detected %s: %s\n", what, info[i].type); - return i; - } - } - - NV_DEBUG(dev, "No devices found.\n"); - return -ENODEV; + struct nouveau_i2c *i2c = (void *)object; + return nouveau_subdev_fini(&i2c->base, suspend); } + +struct nouveau_oclass +nouveau_i2c_oclass = { + .handle = NV_SUBDEV(I2C, 0x00), + .ofuncs = &(struct nouveau_ofuncs) { + .ctor = nouveau_i2c_ctor, + .dtor = nouveau_i2c_dtor, + .init = nouveau_i2c_init, + .fini = nouveau_i2c_fini, + }, +}; |