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ef51c416 ML |
1 | /* |
2 | * Copyright 2012 Calxeda, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; either version 2 of the License, or (at your option) | |
7 | * any later version. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include <common.h> | |
19 | #include <ahci.h> | |
20 | #include <asm/io.h> | |
21 | ||
22 | #define CPHY_MAP(dev, addr) ((((dev) & 0x1f) << 7) | (((addr) >> 9) & 0x7f)) | |
23 | #define CPHY_ADDR(base, dev, addr) ((base) | (((addr) & 0x1ff) << 2)) | |
24 | #define CPHY_BASE 0xfff58000 | |
25 | #define CPHY_WIDTH 0x1000 | |
26 | #define CPHY_DTE_XS 5 | |
27 | #define CPHY_MII 31 | |
28 | #define SERDES_CR_CTL 0x80a0 | |
29 | #define SERDES_CR_ADDR 0x80a1 | |
30 | #define SERDES_CR_DATA 0x80a2 | |
31 | #define CR_BUSY 0x0001 | |
32 | #define CR_START 0x0001 | |
33 | #define CR_WR_RDN 0x0002 | |
34 | #define CPHY_TX_INPUT_STS 0x2001 | |
35 | #define CPHY_RX_INPUT_STS 0x2002 | |
36 | #define CPHY_SATA_TX_OVERRIDE_BIT 0x8000 | |
37 | #define CPHY_SATA_RX_OVERRIDE_BIT 0x4000 | |
38 | #define CPHY_TX_INPUT_OVERRIDE 0x2004 | |
39 | #define CPHY_RX_INPUT_OVERRIDE 0x2005 | |
40 | #define SPHY_LANE 0x100 | |
41 | #define SPHY_HALF_RATE 0x0001 | |
42 | #define CPHY_SATA_DPLL_MODE 0x0700 | |
43 | #define CPHY_SATA_DPLL_SHIFT 8 | |
44 | #define CPHY_SATA_TX_ATTEN 0x1c00 | |
45 | #define CPHY_SATA_TX_ATTEN_SHIFT 10 | |
46 | ||
47 | #define HB_SREG_SATA_ATTEN 0xfff3cf24 | |
48 | ||
49 | #define SATA_PORT_BASE 0xffe08000 | |
50 | #define SATA_VERSIONR 0xf8 | |
51 | #define SATA_HB_VERSION 0x3332302a | |
52 | ||
53 | static u32 __combo_phy_reg_read(u8 phy, u8 dev, u32 addr) | |
54 | { | |
55 | u32 data; | |
56 | writel(CPHY_MAP(dev, addr), CPHY_BASE + 0x800 + CPHY_WIDTH * phy); | |
57 | data = readl(CPHY_ADDR(CPHY_BASE + CPHY_WIDTH * phy, dev, addr)); | |
58 | return data; | |
59 | } | |
60 | ||
61 | static void __combo_phy_reg_write(u8 phy, u8 dev, u32 addr, u32 data) | |
62 | { | |
63 | writel(CPHY_MAP(dev, addr), CPHY_BASE + 0x800 + CPHY_WIDTH * phy); | |
64 | writel(data, CPHY_ADDR(CPHY_BASE + CPHY_WIDTH * phy, dev, addr)); | |
65 | } | |
66 | ||
67 | static u32 combo_phy_read(u8 phy, u32 addr) | |
68 | { | |
69 | u8 dev = CPHY_DTE_XS; | |
70 | if (phy == 5) | |
71 | dev = CPHY_MII; | |
72 | while (__combo_phy_reg_read(phy, dev, SERDES_CR_CTL) & CR_BUSY) | |
73 | udelay(5); | |
74 | __combo_phy_reg_write(phy, dev, SERDES_CR_ADDR, addr); | |
75 | __combo_phy_reg_write(phy, dev, SERDES_CR_CTL, CR_START); | |
76 | while (__combo_phy_reg_read(phy, dev, SERDES_CR_CTL) & CR_BUSY) | |
77 | udelay(5); | |
78 | return __combo_phy_reg_read(phy, dev, SERDES_CR_DATA); | |
79 | } | |
80 | ||
81 | static void combo_phy_write(u8 phy, u32 addr, u32 data) | |
82 | { | |
83 | u8 dev = CPHY_DTE_XS; | |
84 | if (phy == 5) | |
85 | dev = CPHY_MII; | |
86 | while (__combo_phy_reg_read(phy, dev, SERDES_CR_CTL) & CR_BUSY) | |
87 | udelay(5); | |
88 | __combo_phy_reg_write(phy, dev, SERDES_CR_ADDR, addr); | |
89 | __combo_phy_reg_write(phy, dev, SERDES_CR_DATA, data); | |
90 | __combo_phy_reg_write(phy, dev, SERDES_CR_CTL, CR_WR_RDN | CR_START); | |
91 | } | |
92 | ||
93 | static void cphy_spread_spectrum_override(u8 phy, u8 lane, u32 val) | |
94 | { | |
95 | u32 tmp; | |
96 | tmp = combo_phy_read(phy, CPHY_RX_INPUT_STS + lane * SPHY_LANE); | |
97 | tmp &= ~CPHY_SATA_RX_OVERRIDE_BIT; | |
98 | combo_phy_write(phy, CPHY_RX_INPUT_OVERRIDE + lane * SPHY_LANE, tmp); | |
99 | ||
100 | tmp |= CPHY_SATA_RX_OVERRIDE_BIT; | |
101 | combo_phy_write(phy, CPHY_RX_INPUT_OVERRIDE + lane * SPHY_LANE, tmp); | |
102 | ||
103 | tmp &= ~CPHY_SATA_DPLL_MODE; | |
104 | tmp |= (val << CPHY_SATA_DPLL_SHIFT) & CPHY_SATA_DPLL_MODE; | |
105 | combo_phy_write(phy, CPHY_RX_INPUT_OVERRIDE + lane * SPHY_LANE, tmp); | |
106 | } | |
107 | ||
108 | static void cphy_tx_attenuation_override(u8 phy, u8 lane) | |
109 | { | |
110 | u32 val; | |
111 | u32 tmp; | |
112 | u8 shift; | |
113 | ||
114 | shift = ((phy == 5) ? 4 : lane) * 4; | |
115 | ||
116 | val = (readl(HB_SREG_SATA_ATTEN) >> shift) & 0xf; | |
117 | ||
118 | if (val & 0x8) | |
119 | return; | |
120 | ||
121 | tmp = combo_phy_read(phy, CPHY_TX_INPUT_STS + lane * SPHY_LANE); | |
122 | tmp &= ~CPHY_SATA_TX_OVERRIDE_BIT; | |
123 | combo_phy_write(phy, CPHY_TX_INPUT_OVERRIDE + lane * SPHY_LANE, tmp); | |
124 | ||
125 | tmp |= CPHY_SATA_TX_OVERRIDE_BIT; | |
126 | combo_phy_write(phy, CPHY_TX_INPUT_OVERRIDE + lane * SPHY_LANE, tmp); | |
127 | ||
128 | tmp |= (val << CPHY_SATA_TX_ATTEN_SHIFT) & CPHY_SATA_TX_ATTEN; | |
129 | combo_phy_write(phy, CPHY_TX_INPUT_OVERRIDE + lane * SPHY_LANE, tmp); | |
130 | } | |
131 | ||
132 | static void cphy_disable_port_overrides(u8 port) | |
133 | { | |
134 | u32 tmp; | |
135 | u8 lane = 0, phy = 0; | |
136 | ||
137 | if (port == 0) | |
138 | phy = 5; | |
139 | else if (port < 5) | |
140 | lane = port - 1; | |
141 | else | |
142 | return; | |
143 | tmp = combo_phy_read(phy, CPHY_RX_INPUT_STS + lane * SPHY_LANE); | |
144 | tmp &= ~CPHY_SATA_RX_OVERRIDE_BIT; | |
145 | combo_phy_write(phy, CPHY_RX_INPUT_OVERRIDE + lane * SPHY_LANE, tmp); | |
146 | ||
147 | tmp = combo_phy_read(phy, CPHY_TX_INPUT_OVERRIDE + lane * SPHY_LANE); | |
148 | tmp &= ~CPHY_SATA_TX_OVERRIDE_BIT; | |
149 | combo_phy_write(phy, CPHY_TX_INPUT_OVERRIDE + lane * SPHY_LANE, tmp); | |
150 | } | |
151 | ||
152 | void cphy_disable_overrides(void) | |
153 | { | |
154 | int i; | |
155 | u32 port_map; | |
156 | ||
157 | port_map = readl(0xffe08000 + HOST_PORTS_IMPL); | |
158 | for (i = 0; i < 5; i++) { | |
159 | if (port_map & (1 << i)) | |
160 | cphy_disable_port_overrides(i); | |
161 | } | |
162 | } | |
163 | ||
164 | static void cphy_override_lane(u8 port) | |
165 | { | |
166 | u32 tmp, k = 0; | |
167 | u8 lane = 0, phy = 0; | |
168 | ||
169 | if (port == 0) | |
170 | phy = 5; | |
171 | else if (port < 5) | |
172 | lane = port - 1; | |
173 | else | |
174 | return; | |
175 | ||
176 | do { | |
177 | tmp = combo_phy_read(0, CPHY_RX_INPUT_STS + | |
178 | lane * SPHY_LANE); | |
179 | } while ((tmp & SPHY_HALF_RATE) && (k++ < 1000)); | |
180 | cphy_spread_spectrum_override(phy, lane, 3); | |
181 | cphy_tx_attenuation_override(phy, lane); | |
182 | } | |
183 | ||
184 | #define WAIT_MS_LINKUP 4 | |
185 | ||
186 | int ahci_link_up(struct ahci_probe_ent *probe_ent, int port) | |
187 | { | |
188 | u32 tmp; | |
189 | int j = 0; | |
190 | u8 *port_mmio = (u8 *)probe_ent->port[port].port_mmio; | |
191 | u32 is_highbank = readl(SATA_PORT_BASE + SATA_VERSIONR) == | |
192 | SATA_HB_VERSION ? 1 : 0; | |
193 | ||
194 | /* Bring up SATA link. | |
195 | * SATA link bringup time is usually less than 1 ms; only very | |
196 | * rarely has it taken between 1-2 ms. Never seen it above 2 ms. | |
197 | */ | |
198 | while (j < WAIT_MS_LINKUP) { | |
199 | if (is_highbank && (j == 0)) { | |
200 | cphy_disable_port_overrides(port); | |
201 | writel(0x301, port_mmio + PORT_SCR_CTL); | |
202 | udelay(1000); | |
203 | writel(0x300, port_mmio + PORT_SCR_CTL); | |
204 | udelay(1000); | |
205 | cphy_override_lane(port); | |
206 | } | |
207 | ||
208 | tmp = readl(port_mmio + PORT_SCR_STAT); | |
209 | if ((tmp & 0xf) == 0x3) | |
210 | return 0; | |
211 | udelay(1000); | |
212 | j++; | |
213 | ||
214 | if ((j == WAIT_MS_LINKUP) && (tmp & 0xf)) | |
215 | j = 0; /* retry phy reset */ | |
216 | } | |
217 | return 1; | |
218 | } |