cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/i2c/anx9805.c

/*
 * Copyright 2013 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"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs <bskeggs@redhat.com>
 */

#define anx9805_pad(p) container_of((p), struct anx9805_pad, base)

#define anx9805_bus(p) container_of((p), struct anx9805_bus, base)

#define anx9805_aux(p) container_of((p), struct anx9805_aux, base)
#include "aux.h"
#include "bus.h"


struct anx9805_pad {
	
struct nvkm_i2c_pad base;
	
struct nvkm_i2c_bus *bus;
	
u8 addr;
};


struct anx9805_bus {
	
struct nvkm_i2c_bus base;
	
struct anx9805_pad *pad;
	
u8 addr;
};


static int anx9805_bus_xfer(struct nvkm_i2c_bus *base, struct i2c_msg *msgs, int num) { struct anx9805_bus *bus = anx9805_bus(base); struct anx9805_pad *pad = bus->pad; struct i2c_adapter *adap = &pad->bus->i2c; struct i2c_msg *msg = msgs; int ret = -ETIMEDOUT; int i, j, cnt = num; u8 seg = 0x00, off = 0x00, tmp; tmp = nvkm_rdi2cr(adap, pad->addr, 0x07) & ~0x10; nvkm_wri2cr(adap, pad->addr, 0x07, tmp | 0x10); nvkm_wri2cr(adap, pad->addr, 0x07, tmp); nvkm_wri2cr(adap, bus->addr, 0x43, 0x05); mdelay(5); while (cnt--) { if ( (msg->flags & I2C_M_RD) && msg->addr == 0x50) { nvkm_wri2cr(adap, bus->addr, 0x40, msg->addr << 1); nvkm_wri2cr(adap, bus->addr, 0x41, seg); nvkm_wri2cr(adap, bus->addr, 0x42, off); nvkm_wri2cr(adap, bus->addr, 0x44, msg->len); nvkm_wri2cr(adap, bus->addr, 0x45, 0x00); nvkm_wri2cr(adap, bus->addr, 0x43, 0x01); for (i = 0; i < msg->len; i++) { j = 0; while (nvkm_rdi2cr(adap, bus->addr, 0x46) & 0x10) { mdelay(5); if (j++ == 32) goto done; } msg->buf[i] = nvkm_rdi2cr(adap, bus->addr, 0x47); } } else if (!(msg->flags & I2C_M_RD)) { if (msg->addr == 0x50 && msg->len == 0x01) { off = msg->buf[0]; } else if (msg->addr == 0x30 && msg->len == 0x01) { seg = msg->buf[0]; } else goto done; } else { goto done; } msg++; } ret = num; done: nvkm_wri2cr(adap, bus->addr, 0x43, 0x00); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs425100.00%4100.00%
Total425100.00%4100.00%

static const struct nvkm_i2c_bus_func anx9805_bus_func = { .xfer = anx9805_bus_xfer, };
static int anx9805_bus_new(struct nvkm_i2c_pad *base, int id, u8 drive, struct nvkm_i2c_bus **pbus) { struct anx9805_pad *pad = anx9805_pad(base); struct anx9805_bus *bus; int ret; if (!(bus = kzalloc(sizeof(*bus), GFP_KERNEL))) return -ENOMEM; *pbus = &bus->base; bus->pad = pad; ret = nvkm_i2c_bus_ctor(&anx9805_bus_func, &pad->base, id, &bus->base); if (ret) return ret; switch (pad->addr) { case 0x39: bus->addr = 0x3d; break; case 0x3b: bus->addr = 0x3f; break; default: return -ENOSYS; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs140100.00%4100.00%
Total140100.00%4100.00%

struct anx9805_aux { struct nvkm_i2c_aux base; struct anx9805_pad *pad; u8 addr; };
static int anx9805_aux_xfer(struct nvkm_i2c_aux *base, bool retry, u8 type, u32 addr, u8 *data, u8 size) { struct anx9805_aux *aux = anx9805_aux(base); struct anx9805_pad *pad = aux->pad; struct i2c_adapter *adap = &pad->bus->i2c; int i, ret = -ETIMEDOUT; u8 buf[16] = {}; u8 tmp; AUX_DBG(&aux->base, "%02x %05x %d", type, addr, size); tmp = nvkm_rdi2cr(adap, pad->addr, 0x07) & ~0x04; nvkm_wri2cr(adap, pad->addr, 0x07, tmp | 0x04); nvkm_wri2cr(adap, pad->addr, 0x07, tmp); nvkm_wri2cr(adap, pad->addr, 0xf7, 0x01); nvkm_wri2cr(adap, aux->addr, 0xe4, 0x80); if (!(type & 1)) { memcpy(buf, data, size); AUX_DBG(&aux->base, "%16ph", buf); for (i = 0; i < size; i++) nvkm_wri2cr(adap, aux->addr, 0xf0 + i, buf[i]); } nvkm_wri2cr(adap, aux->addr, 0xe5, ((size - 1) << 4) | type); nvkm_wri2cr(adap, aux->addr, 0xe6, (addr & 0x000ff) >> 0); nvkm_wri2cr(adap, aux->addr, 0xe7, (addr & 0x0ff00) >> 8); nvkm_wri2cr(adap, aux->addr, 0xe8, (addr & 0xf0000) >> 16); nvkm_wri2cr(adap, aux->addr, 0xe9, 0x01); i = 0; while ((tmp = nvkm_rdi2cr(adap, aux->addr, 0xe9)) & 0x01) { mdelay(5); if (i++ == 32) goto done; } if ((tmp = nvkm_rdi2cr(adap, pad->addr, 0xf7)) & 0x01) { ret = -EIO; goto done; } if (type & 1) { for (i = 0; i < size; i++) buf[i] = nvkm_rdi2cr(adap, aux->addr, 0xf0 + i); AUX_DBG(&aux->base, "%16ph", buf); memcpy(data, buf, size); } ret = 0; done: nvkm_wri2cr(adap, pad->addr, 0xf7, 0x01); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs470100.00%3100.00%
Total470100.00%3100.00%


static int anx9805_aux_lnk_ctl(struct nvkm_i2c_aux *base, int link_nr, int link_bw, bool enh) { struct anx9805_aux *aux = anx9805_aux(base); struct anx9805_pad *pad = aux->pad; struct i2c_adapter *adap = &pad->bus->i2c; u8 tmp, i; AUX_DBG(&aux->base, "ANX9805 train %d %02x %d", link_nr, link_bw, enh); nvkm_wri2cr(adap, aux->addr, 0xa0, link_bw); nvkm_wri2cr(adap, aux->addr, 0xa1, link_nr | (enh ? 0x80 : 0x00)); nvkm_wri2cr(adap, aux->addr, 0xa2, 0x01); nvkm_wri2cr(adap, aux->addr, 0xa8, 0x01); i = 0; while ((tmp = nvkm_rdi2cr(adap, aux->addr, 0xa8)) & 0x01) { mdelay(5); if (i++ == 100) { AUX_ERR(&aux->base, "link training timeout"); return -ETIMEDOUT; } } if (tmp & 0x70) { AUX_ERR(&aux->base, "link training failed"); return -EIO; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs210100.00%2100.00%
Total210100.00%2100.00%

static const struct nvkm_i2c_aux_func anx9805_aux_func = { .xfer = anx9805_aux_xfer, .lnk_ctl = anx9805_aux_lnk_ctl, };
static int anx9805_aux_new(struct nvkm_i2c_pad *base, int id, u8 drive, struct nvkm_i2c_aux **pbus) { struct anx9805_pad *pad = anx9805_pad(base); struct anx9805_aux *aux; int ret; if (!(aux = kzalloc(sizeof(*aux), GFP_KERNEL))) return -ENOMEM; *pbus = &aux->base; aux->pad = pad; ret = nvkm_i2c_aux_ctor(&anx9805_aux_func, &pad->base, id, &aux->base); if (ret) return ret; switch (pad->addr) { case 0x39: aux->addr = 0x38; break; case 0x3b: aux->addr = 0x3c; break; default: return -ENOSYS; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs13898.57%266.67%
Ilia Mirkin21.43%133.33%
Total140100.00%3100.00%

static const struct nvkm_i2c_pad_func anx9805_pad_func = { .bus_new_4 = anx9805_bus_new, .aux_new_6 = anx9805_aux_new, };
int anx9805_pad_new(struct nvkm_i2c_bus *bus, int id, u8 addr, struct nvkm_i2c_pad **ppad) { struct anx9805_pad *pad; if (!(pad = kzalloc(sizeof(*pad), GFP_KERNEL))) return -ENOMEM; *ppad = &pad->base; nvkm_i2c_pad_ctor(&anx9805_pad_func, bus->pad->i2c, id, &pad->base); pad->bus = bus; pad->addr = addr; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs91100.00%2100.00%
Total91100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs160299.88%583.33%
Ilia Mirkin20.12%116.67%
Total1604100.00%6100.00%
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