1 /*******************************************************************************
2 This contains the functions to handle the platform driver.
4 Copyright (C) 2007-2011 STMicroelectronics Ltd
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
22 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
23 *******************************************************************************/
25 #include <linux/platform_device.h>
28 #include <linux/of_net.h>
29 #include <linux/gpio.h>
30 #include <linux/of_gpio.h>
32 #include <linux/rockchip/iomap.h>
33 #include <linux/rockchip/grf.h>
35 #define grf_readl(offset) readl_relaxed(RK_GRF_VIRT + offset)
36 #define grf_writel(v, offset) do { writel_relaxed(v, RK_GRF_VIRT + offset); dsb(); } while (0)
38 // RK3288_GRF_SOC_CON1
39 #define GMAC_PHY_INTF_SEL_RGMII ((0x01C0 << 16) | (0x0040))
40 #define GMAC_PHY_INTF_SEL_RMII ((0x01C0 << 16) | (0x0100))
41 #define GMAC_FLOW_CTRL ((0x0200 << 16) | (0x0200))
42 #define GMAC_FLOW_CTRL_CLR ((0x0200 << 16) | (0x0000))
43 #define GMAC_SPEED_10M ((0x0400 << 16) | (0x0400))
44 #define GMAC_SPEED_100M ((0x0400 << 16) | (0x0000))
45 #define GMAC_RMII_CLK_25M ((0x0800 << 16) | (0x0800))
46 #define GMAC_RMII_CLK_2_5M ((0x0800 << 16) | (0x0000))
47 #define GMAC_CLK_125M ((0x3000 << 16) | (0x0000))
48 #define GMAC_CLK_25M ((0x3000 << 16) | (0x3000))
49 #define GMAC_CLK_2_5M ((0x3000 << 16) | (0x2000))
50 #define GMAC_RMII_MODE ((0x4000 << 16) | (0x4000))
51 #define GMAC_RMII_MODE_CLR ((0x4000 << 16) | (0x0000))
53 // RK3288_GRF_SOC_CON3
54 #define GMAC_TXCLK_DLY_ENABLE ((0x4000 << 16) | (0x4000))
55 #define GMAC_TXCLK_DLY_DISABLE ((0x4000 << 16) | (0x0000))
56 #define GMAC_RXCLK_DLY_ENABLE ((0x8000 << 16) | (0x8000))
57 #define GMAC_RXCLK_DLY_DISABLE ((0x8000 << 16) | (0x0000))
59 #define GMAC_CLK_RX_DL_CFG ((0x3F80 << 16) | (0x0800))
60 #define GMAC_CLK_TX_DL_CFG ((0x007F << 16) | (0x0040))
62 #define GMAC_CLK_RX_DL_CFG(val) ((0x3F80 << 16) | (val<<7)) // 7bit
63 #define GMAC_CLK_TX_DL_CFG(val) ((0x007F << 16) | (val)) // 7bit
65 struct bsp_priv g_bsp_priv;
67 static int phy_power_on(struct plat_stmmacenet_data *plat, int enable)
69 struct bsp_priv * bsp_priv;
71 printk("enter %s ,enable = %d \n",__func__,enable);
73 if ((plat) && (plat->bsp_priv)) {
74 bsp_priv = plat->bsp_priv;
76 printk("ERROR: platform data or private data is NULL. %s\n", __FUNCTION__);
82 if (gpio_is_valid(bsp_priv->power_io)) {
83 gpio_direction_output(bsp_priv->power_io, 0);
84 gpio_set_value(bsp_priv->power_io, 1);
88 if (gpio_is_valid(bsp_priv->reset_io)) {
89 gpio_direction_output(bsp_priv->reset_io, 0);
90 gpio_set_value(bsp_priv->reset_io, 0);
92 gpio_set_value(bsp_priv->reset_io, 1);
96 if (gpio_is_valid(bsp_priv->power_io)) {
97 gpio_direction_output(bsp_priv->power_io, 0);
98 gpio_set_value(bsp_priv->power_io, 0);
105 int stmmc_pltfr_init(struct platform_device *pdev) {
106 struct pinctrl_state *gmac_state;
110 printk("enter func %s...\n", __func__);
114 if ((pdev->dev.pins) && (pdev->dev.pins->p)) {
115 gmac_state = pinctrl_lookup_state(pdev->dev.pins->p, "default");
116 if (IS_ERR(gmac_state)) {
117 dev_err(&pdev->dev, "no gmc pinctrl state\n");
121 pinctrl_select_state(pdev->dev.pins->p, gmac_state);
125 struct bsp_priv * bsp_priv = &g_bsp_priv;
126 phy_iface = bsp_priv->phy_iface;
128 if (!gpio_is_valid(bsp_priv->power_io)) {
129 printk("%s: ERROR: Get power-gpio failed.\n", __func__);
133 err = gpio_request(bsp_priv->power_io, "gmac_phy_power");
135 printk("%s: ERROR: Request gmac phy power pin failed.\n", __func__);
139 if (!gpio_is_valid(bsp_priv->reset_io)) {
140 printk("%s: ERROR: Get reset-gpio failed.\n", __func__);
144 err = gpio_request(bsp_priv->reset_io, "gmac_phy_reset");
146 printk("%s: ERROR: Request gmac phy reset pin failed.\n", __func__);
151 if (phy_iface & PHY_INTERFACE_MODE_RGMII) {
152 printk("init for RGMII\n");
153 grf_writel(GMAC_PHY_INTF_SEL_RGMII, RK3288_GRF_SOC_CON1);
154 grf_writel(GMAC_RMII_MODE_CLR, RK3288_GRF_SOC_CON1);
155 grf_writel(GMAC_RXCLK_DLY_ENABLE, RK3288_GRF_SOC_CON3);
156 grf_writel(GMAC_TXCLK_DLY_ENABLE, RK3288_GRF_SOC_CON3);
157 grf_writel(GMAC_CLK_RX_DL_CFG(0x10), RK3288_GRF_SOC_CON3);
158 grf_writel(GMAC_CLK_TX_DL_CFG(0x40), RK3288_GRF_SOC_CON3);
159 } else if (phy_iface & PHY_INTERFACE_MODE_RMII) {
160 printk("init for RMII\n");
161 grf_writel(GMAC_PHY_INTF_SEL_RMII, RK3288_GRF_SOC_CON1);
162 grf_writel(GMAC_RMII_MODE, RK3288_GRF_SOC_CON1);
164 printk("ERROR: NO interface defined!\n");
170 void * stmmc_pltfr_fix_mac_speed(void *priv, unsigned int speed){
171 printk("enter func %s...\n", __func__);
172 struct bsp_priv * bsp_priv = priv;
175 printk("fix speed to %d\n", speed);
178 interface = bsp_priv->phy_iface;
181 if (interface & PHY_INTERFACE_MODE_RGMII) {
182 printk("fix speed for RGMII\n");
186 grf_writel(GMAC_CLK_2_5M, RK3288_GRF_SOC_CON1);
190 grf_writel(GMAC_CLK_25M, RK3288_GRF_SOC_CON1);
194 grf_writel(GMAC_CLK_125M, RK3288_GRF_SOC_CON1);
198 printk("ERROR: speed %d is not defined!\n");
202 } else if (interface & PHY_INTERFACE_MODE_RMII) {
203 printk("fix speed for RMII\n");
206 grf_writel(GMAC_RMII_CLK_2_5M, RK3288_GRF_SOC_CON1);
210 grf_writel(GMAC_RMII_CLK_25M, RK3288_GRF_SOC_CON1);
214 printk("ERROR: speed %d is not defined!\n");
218 printk("ERROR: NO interface defined!\n");
226 static int stmmac_probe_config_dt(struct platform_device *pdev,
227 struct plat_stmmacenet_data *plat,
230 struct device_node *np = pdev->dev.of_node;
231 enum of_gpio_flags flags;
236 *mac = of_get_mac_address(np);
237 plat->interface = of_get_phy_mode(np);
238 plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
239 sizeof(struct stmmac_mdio_bus_data),
242 plat->init = stmmc_pltfr_init;
243 plat->fix_mac_speed = stmmc_pltfr_fix_mac_speed;
245 g_bsp_priv.reset_io =
246 of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);
247 g_bsp_priv.power_io =
248 of_get_named_gpio_flags(np, "power-gpio", 0, &flags);
250 g_bsp_priv.phy_iface = plat->interface;
251 g_bsp_priv.phy_power_on = phy_power_on;
253 plat->bsp_priv = &g_bsp_priv;
256 * Currently only the properties needed on SPEAr600
257 * are provided. All other properties should be added
258 * once needed on other platforms.
260 if (of_device_is_compatible(np, "rockchip,gmac")) {
268 static int stmmac_probe_config_dt(struct platform_device *pdev,
269 struct plat_stmmacenet_data *plat,
274 #endif /* CONFIG_OF */
278 * @pdev: platform device pointer
279 * Description: platform_device probe function. It allocates
280 * the necessary resources and invokes the main to init
281 * the net device, register the mdio bus etc.
283 static int stmmac_pltfr_probe(struct platform_device *pdev)
286 struct resource *res;
287 struct device *dev = &pdev->dev;
288 void __iomem *addr = NULL;
289 struct stmmac_priv *priv = NULL;
290 struct plat_stmmacenet_data *plat_dat = NULL;
291 const char *mac = NULL;
293 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
297 addr = devm_ioremap_resource(dev, res);
299 return PTR_ERR(addr);
301 if (pdev->dev.of_node) {
302 plat_dat = devm_kzalloc(&pdev->dev,
303 sizeof(struct plat_stmmacenet_data),
306 pr_err("%s: ERROR: no memory", __func__);
310 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
312 pr_err("%s: main dt probe failed", __func__);
316 plat_dat = pdev->dev.platform_data;
319 /* Custom initialisation (if needed)*/
320 if (plat_dat->init) {
321 ret = plat_dat->init(pdev);
326 priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
328 pr_err("%s: main driver probe failed", __func__);
332 /* Get MAC address if available (DT) */
334 memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
336 /* Get the MAC information */
337 priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
338 if (priv->dev->irq == -ENXIO) {
339 pr_err("%s: ERROR: MAC IRQ configuration "
340 "information not found\n", __func__);
345 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
346 * The external wake up irq can be passed through the platform code
347 * named as "eth_wake_irq"
349 * In case the wake up interrupt is not passed from the platform
350 * so the driver will continue to use the mac irq (ndev->irq)
352 priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
353 if (priv->wol_irq == -ENXIO)
354 priv->wol_irq = priv->dev->irq;
356 priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
358 platform_set_drvdata(pdev, priv->dev);
360 pr_debug("STMMAC platform driver registration completed");
366 * stmmac_pltfr_remove
367 * @pdev: platform device pointer
368 * Description: this function calls the main to free the net resources
369 * and calls the platforms hook and release the resources (e.g. mem).
371 static int stmmac_pltfr_remove(struct platform_device *pdev)
373 struct net_device *ndev = platform_get_drvdata(pdev);
374 struct stmmac_priv *priv = netdev_priv(ndev);
375 int ret = stmmac_dvr_remove(ndev);
377 if (priv->plat->exit)
378 priv->plat->exit(pdev);
380 platform_set_drvdata(pdev, NULL);
386 static int stmmac_pltfr_suspend(struct device *dev)
388 struct net_device *ndev = dev_get_drvdata(dev);
390 return stmmac_suspend(ndev);
393 static int stmmac_pltfr_resume(struct device *dev)
395 struct net_device *ndev = dev_get_drvdata(dev);
397 return stmmac_resume(ndev);
400 int stmmac_pltfr_freeze(struct device *dev)
403 struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
404 struct net_device *ndev = dev_get_drvdata(dev);
405 struct platform_device *pdev = to_platform_device(dev);
407 ret = stmmac_freeze(ndev);
409 plat_dat->exit(pdev);
414 int stmmac_pltfr_restore(struct device *dev)
416 struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
417 struct net_device *ndev = dev_get_drvdata(dev);
418 struct platform_device *pdev = to_platform_device(dev);
421 plat_dat->init(pdev);
423 return stmmac_restore(ndev);
426 static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
427 .suspend = stmmac_pltfr_suspend,
428 .resume = stmmac_pltfr_resume,
429 .freeze = stmmac_pltfr_freeze,
430 .thaw = stmmac_pltfr_restore,
431 .restore = stmmac_pltfr_restore,
434 static const struct dev_pm_ops stmmac_pltfr_pm_ops;
435 #endif /* CONFIG_PM */
437 static const struct of_device_id stmmac_dt_ids[] = {
438 { .compatible = "rockchip,gmac"},
441 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
443 struct platform_driver stmmac_pltfr_driver = {
444 .probe = stmmac_pltfr_probe,
445 .remove = stmmac_pltfr_remove,
447 .name = STMMAC_RESOURCE_NAME,
448 .owner = THIS_MODULE,
449 .pm = &stmmac_pltfr_pm_ops,
450 .of_match_table = of_match_ptr(stmmac_dt_ids),
454 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
455 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
456 MODULE_LICENSE("GPL");