1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2011-2013 Freescale Semiconductor, Inc.
4 * Copyright 2011 Linaro Ltd.
5 */
6
7#include <linux/clk.h>
8#include <linux/irqchip.h>
9#include <linux/of_platform.h>
10#include <linux/pci.h>
11#include <linux/phy.h>
12#include <linux/regmap.h>
13#include <linux/micrel_phy.h>
14#include <linux/mfd/syscon.h>
15#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
16#include <asm/mach/arch.h>
17#include <asm/mach/map.h>
18
19#include "common.h"
20#include "cpuidle.h"
21#include "hardware.h"
22
23/* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
24static int ksz9021rn_phy_fixup(struct phy_device *phydev)
25{
26 if (IS_BUILTIN(CONFIG_PHYLIB)) {
27 /* min rx data delay */
28 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
29 val: 0x8000 | MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW);
30 phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, val: 0x0000);
31
32 /* max rx/tx clock delay, min rx/tx control delay */
33 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
34 val: 0x8000 | MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
35 phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, val: 0xf0f0);
36 phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
37 MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
38 }
39
40 return 0;
41}
42
43/*
44 * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
45 * as they are used for slots1-7 PERST#
46 */
47static void ventana_pciesw_early_fixup(struct pci_dev *dev)
48{
49 u32 dw;
50
51 if (!of_machine_is_compatible(compat: "gw,ventana"))
52 return;
53
54 if (dev->devfn != 0)
55 return;
56
57 pci_read_config_dword(dev, where: 0x62c, val: &dw);
58 dw |= 0xaaa8; // GPIO1-7 outputs
59 pci_write_config_dword(dev, where: 0x62c, val: dw);
60
61 pci_read_config_dword(dev, where: 0x644, val: &dw);
62 dw |= 0xfe; // GPIO1-7 output high
63 pci_write_config_dword(dev, where: 0x644, val: dw);
64
65 msleep(msecs: 100);
66}
67DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, ventana_pciesw_early_fixup);
68DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, ventana_pciesw_early_fixup);
69DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, ventana_pciesw_early_fixup);
70
71static void __init imx6q_enet_phy_init(void)
72{
73 if (IS_BUILTIN(CONFIG_PHYLIB)) {
74 phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
75 run: ksz9021rn_phy_fixup);
76 }
77}
78
79static void __init imx6q_1588_init(void)
80{
81 struct device_node *np;
82 struct clk *ptp_clk, *fec_enet_ref;
83 struct clk *enet_ref;
84 struct regmap *gpr;
85 u32 clksel;
86
87 np = of_find_compatible_node(NULL, NULL, compat: "fsl,imx6q-fec");
88 if (!np) {
89 pr_warn("%s: failed to find fec node\n", __func__);
90 return;
91 }
92
93 /*
94 * If enet_clk_ref configured, we assume DT did it properly and .
95 * clk-imx6q.c will do needed configuration.
96 */
97 fec_enet_ref = of_clk_get_by_name(np, name: "enet_clk_ref");
98 if (!IS_ERR(ptr: fec_enet_ref))
99 goto put_node;
100
101 ptp_clk = of_clk_get(np, index: 2);
102 if (IS_ERR(ptr: ptp_clk)) {
103 pr_warn("%s: failed to get ptp clock\n", __func__);
104 goto put_node;
105 }
106
107 enet_ref = clk_get_sys(NULL, con_id: "enet_ref");
108 if (IS_ERR(ptr: enet_ref)) {
109 pr_warn("%s: failed to get enet clock\n", __func__);
110 goto put_ptp_clk;
111 }
112
113 /*
114 * If enet_ref from ANATOP/CCM is the PTP clock source, we need to
115 * set bit IOMUXC_GPR1[21]. Or the PTP clock must be from pad
116 * (external OSC), and we need to clear the bit.
117 */
118 clksel = clk_is_match(p: ptp_clk, q: enet_ref) ?
119 IMX6Q_GPR1_ENET_CLK_SEL_ANATOP :
120 IMX6Q_GPR1_ENET_CLK_SEL_PAD;
121 gpr = syscon_regmap_lookup_by_compatible(s: "fsl,imx6q-iomuxc-gpr");
122 if (!IS_ERR(ptr: gpr))
123 regmap_update_bits(map: gpr, IOMUXC_GPR1,
124 IMX6Q_GPR1_ENET_CLK_SEL_MASK,
125 val: clksel);
126 else
127 pr_err("failed to find fsl,imx6q-iomuxc-gpr regmap\n");
128
129 clk_put(clk: enet_ref);
130put_ptp_clk:
131 clk_put(clk: ptp_clk);
132put_node:
133 of_node_put(node: np);
134}
135
136static void __init imx6q_axi_init(void)
137{
138 struct regmap *gpr;
139 unsigned int mask;
140
141 gpr = syscon_regmap_lookup_by_compatible(s: "fsl,imx6q-iomuxc-gpr");
142 if (!IS_ERR(ptr: gpr)) {
143 /*
144 * Enable the cacheable attribute of VPU and IPU
145 * AXI transactions.
146 */
147 mask = IMX6Q_GPR4_VPU_WR_CACHE_SEL |
148 IMX6Q_GPR4_VPU_RD_CACHE_SEL |
149 IMX6Q_GPR4_VPU_P_WR_CACHE_VAL |
150 IMX6Q_GPR4_VPU_P_RD_CACHE_VAL_MASK |
151 IMX6Q_GPR4_IPU_WR_CACHE_CTL |
152 IMX6Q_GPR4_IPU_RD_CACHE_CTL;
153 regmap_update_bits(map: gpr, IOMUXC_GPR4, mask, val: mask);
154
155 /* Increase IPU read QoS priority */
156 regmap_update_bits(map: gpr, IOMUXC_GPR6,
157 IMX6Q_GPR6_IPU1_ID00_RD_QOS_MASK |
158 IMX6Q_GPR6_IPU1_ID01_RD_QOS_MASK,
159 val: (0xf << 16) | (0x7 << 20));
160 regmap_update_bits(map: gpr, IOMUXC_GPR7,
161 IMX6Q_GPR7_IPU2_ID00_RD_QOS_MASK |
162 IMX6Q_GPR7_IPU2_ID01_RD_QOS_MASK,
163 val: (0xf << 16) | (0x7 << 20));
164 } else {
165 pr_warn("failed to find fsl,imx6q-iomuxc-gpr regmap\n");
166 }
167}
168
169static void __init imx6q_init_machine(void)
170{
171 if (cpu_is_imx6q() && imx_get_soc_revision() >= IMX_CHIP_REVISION_2_0)
172 /*
173 * SoCs that identify as i.MX6Q >= rev 2.0 are really i.MX6QP.
174 * Quirk: i.MX6QP revision = i.MX6Q revision - (1, 0),
175 * e.g. i.MX6QP rev 1.1 identifies as i.MX6Q rev 2.1.
176 */
177 imx_print_silicon_rev(cpu: "i.MX6QP", srev: imx_get_soc_revision() - 0x10);
178 else
179 imx_print_silicon_rev(cpu: cpu_is_imx6dl() ? "i.MX6DL" : "i.MX6Q",
180 srev: imx_get_soc_revision());
181
182 imx6q_enet_phy_init();
183
184 of_platform_default_populate(NULL, NULL, NULL);
185
186 imx_anatop_init();
187 cpu_is_imx6q() ? imx6q_pm_init() : imx6dl_pm_init();
188 imx6q_1588_init();
189 imx6q_axi_init();
190}
191
192static void __init imx6q_init_late(void)
193{
194 /*
195 * WAIT mode is broken on imx6 Dual/Quad revision 1.0 and 1.1 so
196 * there is no point to run cpuidle on them.
197 *
198 * It does work on imx6 Solo/DualLite starting from 1.1
199 */
200 if ((cpu_is_imx6q() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_1) ||
201 (cpu_is_imx6dl() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_0))
202 imx6q_cpuidle_init();
203
204 if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ))
205 platform_device_register_simple(name: "imx6q-cpufreq", id: -1, NULL, num: 0);
206}
207
208static void __init imx6q_map_io(void)
209{
210 debug_ll_io_init();
211 imx_scu_map_io();
212}
213
214static void __init imx6q_init_irq(void)
215{
216 imx_gpc_check_dt();
217 imx_init_revision_from_anatop();
218 imx_init_l2cache();
219 imx_src_init();
220 irqchip_init();
221 imx6_pm_ccm_init(ccm_compat: "fsl,imx6q-ccm");
222}
223
224static const char * const imx6q_dt_compat[] __initconst = {
225 "fsl,imx6dl",
226 "fsl,imx6q",
227 "fsl,imx6qp",
228 NULL,
229};
230
231DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)")
232 .l2c_aux_val = 0,
233 .l2c_aux_mask = ~0,
234 .smp = smp_ops(imx_smp_ops),
235 .map_io = imx6q_map_io,
236 .init_irq = imx6q_init_irq,
237 .init_machine = imx6q_init_machine,
238 .init_late = imx6q_init_late,
239 .dt_compat = imx6q_dt_compat,
240MACHINE_END
241

source code of linux/arch/arm/mach-imx/mach-imx6q.c