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authorJesse Barnes <jbarnes@virtuousgeek.org>2008-12-09 10:23:43 -0800
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-12-09 10:23:43 -0800
commit6656db10551bbb8770dd945b6d81d5138521f208 (patch)
tree68e457660c174ee2e16353691126ddd754c79398 /shared-core/radeon_ms_i2c.c
parentc99566fb810c9d8cae5e9cd39d1772b55e2f514c (diff)
parent12e68f8059485fb4f02a15f74ab2fa3bdff38c81 (diff)
Merge branch 'modesetting-gem'
Diffstat (limited to 'shared-core/radeon_ms_i2c.c')
-rw-r--r--shared-core/radeon_ms_i2c.c336
1 files changed, 336 insertions, 0 deletions
diff --git a/shared-core/radeon_ms_i2c.c b/shared-core/radeon_ms_i2c.c
new file mode 100644
index 00000000..f4468c1e
--- /dev/null
+++ b/shared-core/radeon_ms_i2c.c
@@ -0,0 +1,336 @@
+/*
+ * Copyright 2007 Jérôme Glisse
+ * Copyright 2007 Alex Deucher
+ * Copyright 2007 Dave Airlie
+ * All Rights Reserved.
+ *
+ * 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 on 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 (including the
+ * next paragraph) 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
+ * NON-INFRINGEMENT. IN NO EVENT SHALL ATI, VA LINUX SYSTEMS AND/OR
+ * THEIR SUPPLIERS 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.
+ */
+#include "radeon_ms.h"
+
+static int get_clock(void *data)
+{
+ struct radeon_ms_i2c *i2c = data;
+ struct drm_radeon_private *dev_priv = i2c->drm_dev->dev_private;
+ int v;
+
+ switch (i2c->reg) {
+ case VIPPAD_EN:
+ v = MMIO_R(VIPPAD_Y);
+ if ((REG_G(VIPPAD_Y, VIPPAD_Y_VHAD, v) & 2)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case VIPPAD1_EN:
+ v = MMIO_R(VIPPAD1_Y);
+ if ((REG_G(VIPPAD1_Y, VIPPAD_Y_DVODATA, v) & 8)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case GPIO_DDC1:
+ v = MMIO_R(GPIO_DDC1);
+ if ((GPIO_DDC1__DDC1_CLK_INPUT & v)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case GPIO_DDC2:
+ v = MMIO_R(GPIO_DDC2);
+ if ((GPIO_DDC2__DDC2_CLK_INPUT & v)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case GPIO_MONID:
+ v = MMIO_R(GPIO_MONID);
+ if ((GPIO_MONID__GPIO_MONID_1_INPUT & v)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case GPIO_CRT2_DDC:
+ v = MMIO_R(GPIO_CRT2_DDC);
+ if ((GPIO_CRT2_DDC__CRT2_DDC_CLK_INPUT & v)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ default:
+ v = 0;
+ break;
+ }
+ return v;
+}
+
+static int get_data(void *data)
+{
+ struct radeon_ms_i2c *i2c = data;
+ struct drm_radeon_private *dev_priv = i2c->drm_dev->dev_private;
+ int v;
+
+ switch (i2c->reg) {
+ case VIPPAD_EN:
+ v = MMIO_R(VIPPAD_Y);
+ if ((REG_G(VIPPAD_Y, VIPPAD_Y_VHAD, v) & 1)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case VIPPAD1_EN:
+ v = MMIO_R(VIPPAD1_Y);
+ if ((REG_G(VIPPAD1_Y, VIPPAD_Y_DVODATA, v) & 4)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case GPIO_DDC1:
+ v = MMIO_R(GPIO_DDC1);
+ if ((GPIO_DDC1__DDC1_DATA_INPUT & v)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case GPIO_DDC2:
+ v = MMIO_R(GPIO_DDC2);
+ if ((GPIO_DDC2__DDC2_DATA_INPUT & v)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case GPIO_MONID:
+ v = MMIO_R(GPIO_MONID);
+ if ((GPIO_MONID__GPIO_MONID_0_INPUT & v)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ case GPIO_CRT2_DDC:
+ v = MMIO_R(GPIO_CRT2_DDC);
+ if ((GPIO_CRT2_DDC__CRT2_DDC_DATA_INPUT & v)) {
+ v = 1;
+ } else {
+ v = 0;
+ }
+ break;
+ default:
+ v = 0;
+ break;
+ }
+ return v;
+}
+
+static void set_clock(void *i2c_priv, int clock)
+{
+ struct radeon_ms_i2c *i2c = i2c_priv;
+ struct drm_radeon_private *dev_priv = i2c->drm_dev->dev_private;
+ int v, line;
+
+ v = MMIO_R(i2c->reg);
+ switch (i2c->reg) {
+ case VIPPAD_EN:
+ line = REG_G(VIPPAD_EN, VIPPAD_EN_VHAD, v) & ~2;
+ v &= ~VIPPAD_EN__VIPPAD_EN_VHAD__MASK;
+ if (!clock) {
+ v |= REG_S(VIPPAD_EN, VIPPAD_EN_VHAD, line | 2);
+ } else {
+ v |= REG_S(VIPPAD_EN, VIPPAD_EN_VHAD, line);
+ }
+ break;
+ case VIPPAD1_EN:
+ line = REG_G(VIPPAD1_EN, VIPPAD_EN_DVODATA, v) & ~8;
+ v &= ~VIPPAD1_EN__VIPPAD_EN_DVODATA__MASK;
+ if (!clock) {
+ v |= REG_S(VIPPAD1_EN, VIPPAD_EN_DVODATA, line | 8);
+ } else {
+ v |= REG_S(VIPPAD1_EN, VIPPAD_EN_DVODATA, line);
+ }
+ break;
+ case GPIO_DDC1:
+ v &= ~GPIO_DDC1__DDC1_CLK_OUT_EN;
+ if (!clock) {
+ v |= GPIO_DDC1__DDC1_CLK_OUT_EN;
+ }
+ break;
+ case GPIO_DDC2:
+ v &= ~GPIO_DDC2__DDC2_CLK_OUT_EN;
+ if (!clock) {
+ v |= GPIO_DDC2__DDC2_CLK_OUT_EN;
+ }
+ break;
+ case GPIO_MONID:
+ v &= ~GPIO_MONID__GPIO_MONID_1_OUT_EN;
+ if (!clock) {
+ v |= GPIO_MONID__GPIO_MONID_1_OUT_EN;
+ }
+ break;
+ case GPIO_CRT2_DDC:
+ v &= ~GPIO_CRT2_DDC__CRT2_DDC_CLK_OUT_EN;
+ if (!clock) {
+ v |= GPIO_CRT2_DDC__CRT2_DDC_CLK_OUT_EN;
+ }
+ break;
+ default:
+ return;
+ }
+ MMIO_W(i2c->reg, v);
+}
+
+static void set_data(void *i2c_priv, int data)
+{
+ struct radeon_ms_i2c *i2c = i2c_priv;
+ struct drm_radeon_private *dev_priv = i2c->drm_dev->dev_private;
+ int v, line;
+
+ v = MMIO_R(i2c->reg);
+ switch (i2c->reg) {
+ case VIPPAD_EN:
+ line = REG_G(VIPPAD_EN, VIPPAD_EN_VHAD, v) & ~1;
+ v &= ~VIPPAD_EN__VIPPAD_EN_VHAD__MASK;
+ if (!data) {
+ v |= REG_S(VIPPAD_EN, VIPPAD_EN_VHAD, line | 1);
+ } else {
+ v |= REG_S(VIPPAD_EN, VIPPAD_EN_VHAD, line);
+ }
+ break;
+ case VIPPAD1_EN:
+ line = REG_G(VIPPAD1_EN, VIPPAD_EN_DVODATA, v) & ~4;
+ v &= ~VIPPAD1_EN__VIPPAD_EN_DVODATA__MASK;
+ if (!data) {
+ v |= REG_S(VIPPAD1_EN, VIPPAD_EN_DVODATA, line | 4);
+ } else {
+ v |= REG_S(VIPPAD1_EN, VIPPAD_EN_DVODATA, line);
+ }
+ break;
+ case GPIO_DDC1:
+ v &= ~GPIO_DDC1__DDC1_DATA_OUT_EN;
+ if (!data) {
+ v |= GPIO_DDC1__DDC1_DATA_OUT_EN;
+ }
+ break;
+ case GPIO_DDC2:
+ v &= ~GPIO_DDC2__DDC2_DATA_OUT_EN;
+ if (!data) {
+ v |= GPIO_DDC2__DDC2_DATA_OUT_EN;
+ }
+ break;
+ case GPIO_MONID:
+ v &= ~GPIO_MONID__GPIO_MONID_0_OUT_EN;
+ if (!data) {
+ v |= GPIO_MONID__GPIO_MONID_0_OUT_EN;
+ }
+ break;
+ case GPIO_CRT2_DDC:
+ v &= ~GPIO_CRT2_DDC__CRT2_DDC_DATA_OUT_EN;
+ if (!data) {
+ v |= GPIO_CRT2_DDC__CRT2_DDC_DATA_OUT_EN;
+ }
+ break;
+ default:
+ return;
+ }
+ MMIO_W(i2c->reg, v);
+}
+
+/**
+ * radeon_ms_i2c_create - instantiate an radeon i2c bus on specified GPIO reg
+ * @dev: DRM device
+ * @output: driver specific output device
+ * @reg: GPIO reg to use
+ * @name: name for this bus
+ *
+ * Creates and registers a new i2c bus with the Linux i2c layer, for use
+ * in output probing and control (e.g. DDC or SDVO control functions).
+ *
+ */
+struct radeon_ms_i2c *radeon_ms_i2c_create(struct drm_device *dev,
+ const uint32_t reg,
+ const char *name)
+{
+ struct radeon_ms_i2c *i2c;
+ int ret;
+
+ i2c = drm_alloc(sizeof(struct radeon_ms_i2c), DRM_MEM_DRIVER);
+ if (i2c == NULL) {
+ return NULL;
+ }
+ memset(i2c, 0, sizeof(struct radeon_ms_i2c));
+
+ i2c->drm_dev = dev;
+ i2c->reg = reg;
+ snprintf(i2c->adapter.name, I2C_NAME_SIZE, "radeon-%s", name);
+ i2c->adapter.owner = THIS_MODULE;
+ /* fixme need to take a look at what its needed for */
+ i2c->adapter.id = I2C_HW_B_RADEON;
+ i2c->adapter.algo_data = &i2c->algo;
+ i2c->adapter.dev.parent = &dev->pdev->dev;
+ i2c->algo.setsda = set_data;
+ i2c->algo.setscl = set_clock;
+ i2c->algo.getsda = get_data;
+ i2c->algo.getscl = get_clock;
+ i2c->algo.udelay = 20;
+ i2c->algo.timeout = usecs_to_jiffies(2200);
+ i2c->algo.data = i2c;
+
+ i2c_set_adapdata(&i2c->adapter, i2c);
+
+ ret = i2c_bit_add_bus(&i2c->adapter);
+ if(ret) {
+ DRM_INFO("[radeon_ms] failed to register I2C '%s' bus (0x%X)\n",
+ i2c->adapter.name, reg);
+ goto out_free;
+ }
+ DRM_INFO("[radeon_ms] registered I2C '%s' bus (0x%X)\n",
+ i2c->adapter.name, reg);
+ return i2c;
+
+out_free:
+ drm_free(i2c, sizeof(struct radeon_ms_i2c), DRM_MEM_DRIVER);
+ return NULL;
+}
+
+/**
+ * radeon_ms_i2c_destroy - unregister and free i2c bus resources
+ * @output: channel to free
+ *
+ * Unregister the adapter from the i2c layer, then free the structure.
+ */
+void radeon_ms_i2c_destroy(struct radeon_ms_i2c *i2c)
+{
+ if (i2c == NULL) {
+ return;
+ }
+ i2c_del_adapter(&i2c->adapter);
+ drm_free(i2c, sizeof(struct radeon_ms_i2c), DRM_MEM_DRIVER);
+}