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authorGrant Likely <grant.likely@secretlab.ca>2010-12-29 03:05:14 -0500
committerGrant Likely <grant.likely@secretlab.ca>2010-12-29 03:05:50 -0500
commit94a544a4e8d05a027613443c529c399c39cc3371 (patch)
treeedada38e93a958a918b5826eaef173b1b92079d1 /arch/arm/plat-pxa
parent496a2e360a34e1f41c336d23947f800216cb9bdf (diff)
parent21486af0f34d03b813b023d7a2b887b329f60486 (diff)
Merge branch 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/next
* 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/next spi/pxa2xx: register driver properly spi/pxa2xx: add support for shared IRQ handler spi/pxa2xx: Use define for SSSR_TFL_MASK instead of plain numbers arm/pxa2xx: reorgazine SSP and SPI header files spi/pxa2xx: Add CE4100 support spi/pxa2xx: Consider CE4100's FIFO depth spi/pxa2xx: Add chipselect support for Sodaville spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes. spi/pxa2xx: pass of_node to spi device and set a parent device
Diffstat (limited to 'arch/arm/plat-pxa')
-rw-r--r--arch/arm/plat-pxa/include/plat/ssp.h186
-rw-r--r--arch/arm/plat-pxa/ssp.c2
2 files changed, 1 insertions, 187 deletions
diff --git a/arch/arm/plat-pxa/include/plat/ssp.h b/arch/arm/plat-pxa/include/plat/ssp.h
deleted file mode 100644
index fe43150690ed..000000000000
--- a/arch/arm/plat-pxa/include/plat/ssp.h
+++ /dev/null
@@ -1,186 +0,0 @@
1/*
2 * ssp.h
3 *
4 * Copyright (C) 2003 Russell King, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This driver supports the following PXA CPU/SSP ports:-
11 *
12 * PXA250 SSP
13 * PXA255 SSP, NSSP
14 * PXA26x SSP, NSSP, ASSP
15 * PXA27x SSP1, SSP2, SSP3
16 * PXA3xx SSP1, SSP2, SSP3, SSP4
17 */
18
19#ifndef __ASM_ARCH_SSP_H
20#define __ASM_ARCH_SSP_H
21
22#include <linux/list.h>
23#include <linux/io.h>
24
25/*
26 * SSP Serial Port Registers
27 * PXA250, PXA255, PXA26x and PXA27x SSP controllers are all slightly different.
28 * PXA255, PXA26x and PXA27x have extra ports, registers and bits.
29 */
30
31#define SSCR0 (0x00) /* SSP Control Register 0 */
32#define SSCR1 (0x04) /* SSP Control Register 1 */
33#define SSSR (0x08) /* SSP Status Register */
34#define SSITR (0x0C) /* SSP Interrupt Test Register */
35#define SSDR (0x10) /* SSP Data Write/Data Read Register */
36
37#define SSTO (0x28) /* SSP Time Out Register */
38#define SSPSP (0x2C) /* SSP Programmable Serial Protocol */
39#define SSTSA (0x30) /* SSP Tx Timeslot Active */
40#define SSRSA (0x34) /* SSP Rx Timeslot Active */
41#define SSTSS (0x38) /* SSP Timeslot Status */
42#define SSACD (0x3C) /* SSP Audio Clock Divider */
43#define SSACDD (0x40) /* SSP Audio Clock Dither Divider */
44
45/* Common PXA2xx bits first */
46#define SSCR0_DSS (0x0000000f) /* Data Size Select (mask) */
47#define SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..16] */
48#define SSCR0_FRF (0x00000030) /* FRame Format (mask) */
49#define SSCR0_Motorola (0x0 << 4) /* Motorola's Serial Peripheral Interface (SPI) */
50#define SSCR0_TI (0x1 << 4) /* Texas Instruments' Synchronous Serial Protocol (SSP) */
51#define SSCR0_National (0x2 << 4) /* National Microwire */
52#define SSCR0_ECS (1 << 6) /* External clock select */
53#define SSCR0_SSE (1 << 7) /* Synchronous Serial Port Enable */
54#define SSCR0_SCR(x) ((x) << 8) /* Serial Clock Rate (mask) */
55
56/* PXA27x, PXA3xx */
57#define SSCR0_EDSS (1 << 20) /* Extended data size select */
58#define SSCR0_NCS (1 << 21) /* Network clock select */
59#define SSCR0_RIM (1 << 22) /* Receive FIFO overrrun interrupt mask */
60#define SSCR0_TUM (1 << 23) /* Transmit FIFO underrun interrupt mask */
61#define SSCR0_FRDC (0x07000000) /* Frame rate divider control (mask) */
62#define SSCR0_SlotsPerFrm(x) (((x) - 1) << 24) /* Time slots per frame [1..8] */
63#define SSCR0_FPCKE (1 << 29) /* FIFO packing enable */
64#define SSCR0_ACS (1 << 30) /* Audio clock select */
65#define SSCR0_MOD (1 << 31) /* Mode (normal or network) */
66
67
68#define SSCR1_RIE (1 << 0) /* Receive FIFO Interrupt Enable */
69#define SSCR1_TIE (1 << 1) /* Transmit FIFO Interrupt Enable */
70#define SSCR1_LBM (1 << 2) /* Loop-Back Mode */
71#define SSCR1_SPO (1 << 3) /* Motorola SPI SSPSCLK polarity setting */
72#define SSCR1_SPH (1 << 4) /* Motorola SPI SSPSCLK phase setting */
73#define SSCR1_MWDS (1 << 5) /* Microwire Transmit Data Size */
74#define SSCR1_TFT (0x000003c0) /* Transmit FIFO Threshold (mask) */
75#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */
76#define SSCR1_RFT (0x00003c00) /* Receive FIFO Threshold (mask) */
77#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */
78
79#define SSSR_TNF (1 << 2) /* Transmit FIFO Not Full */
80#define SSSR_RNE (1 << 3) /* Receive FIFO Not Empty */
81#define SSSR_BSY (1 << 4) /* SSP Busy */
82#define SSSR_TFS (1 << 5) /* Transmit FIFO Service Request */
83#define SSSR_RFS (1 << 6) /* Receive FIFO Service Request */
84#define SSSR_ROR (1 << 7) /* Receive FIFO Overrun */
85
86
87/* extra bits in PXA255, PXA26x and PXA27x SSP ports */
88#define SSCR0_TISSP (1 << 4) /* TI Sync Serial Protocol */
89#define SSCR0_PSP (3 << 4) /* PSP - Programmable Serial Protocol */
90#define SSCR1_TTELP (1 << 31) /* TXD Tristate Enable Last Phase */
91#define SSCR1_TTE (1 << 30) /* TXD Tristate Enable */
92#define SSCR1_EBCEI (1 << 29) /* Enable Bit Count Error interrupt */
93#define SSCR1_SCFR (1 << 28) /* Slave Clock free Running */
94#define SSCR1_ECRA (1 << 27) /* Enable Clock Request A */
95#define SSCR1_ECRB (1 << 26) /* Enable Clock request B */
96#define SSCR1_SCLKDIR (1 << 25) /* Serial Bit Rate Clock Direction */
97#define SSCR1_SFRMDIR (1 << 24) /* Frame Direction */
98#define SSCR1_RWOT (1 << 23) /* Receive Without Transmit */
99#define SSCR1_TRAIL (1 << 22) /* Trailing Byte */
100#define SSCR1_TSRE (1 << 21) /* Transmit Service Request Enable */
101#define SSCR1_RSRE (1 << 20) /* Receive Service Request Enable */
102#define SSCR1_TINTE (1 << 19) /* Receiver Time-out Interrupt enable */
103#define SSCR1_PINTE (1 << 18) /* Peripheral Trailing Byte Interupt Enable */
104#define SSCR1_IFS (1 << 16) /* Invert Frame Signal */
105#define SSCR1_STRF (1 << 15) /* Select FIFO or EFWR */
106#define SSCR1_EFWR (1 << 14) /* Enable FIFO Write/Read */
107
108#define SSSR_BCE (1 << 23) /* Bit Count Error */
109#define SSSR_CSS (1 << 22) /* Clock Synchronisation Status */
110#define SSSR_TUR (1 << 21) /* Transmit FIFO Under Run */
111#define SSSR_EOC (1 << 20) /* End Of Chain */
112#define SSSR_TINT (1 << 19) /* Receiver Time-out Interrupt */
113#define SSSR_PINT (1 << 18) /* Peripheral Trailing Byte Interrupt */
114
115
116#define SSPSP_SCMODE(x) ((x) << 0) /* Serial Bit Rate Clock Mode */
117#define SSPSP_SFRMP (1 << 2) /* Serial Frame Polarity */
118#define SSPSP_ETDS (1 << 3) /* End of Transfer data State */
119#define SSPSP_STRTDLY(x) ((x) << 4) /* Start Delay */
120#define SSPSP_DMYSTRT(x) ((x) << 7) /* Dummy Start */
121#define SSPSP_SFRMDLY(x) ((x) << 9) /* Serial Frame Delay */
122#define SSPSP_SFRMWDTH(x) ((x) << 16) /* Serial Frame Width */
123#define SSPSP_DMYSTOP(x) ((x) << 23) /* Dummy Stop */
124#define SSPSP_FSRT (1 << 25) /* Frame Sync Relative Timing */
125
126/* PXA3xx */
127#define SSPSP_EDMYSTRT(x) ((x) << 26) /* Extended Dummy Start */
128#define SSPSP_EDMYSTOP(x) ((x) << 28) /* Extended Dummy Stop */
129#define SSPSP_TIMING_MASK (0x7f8001f0)
130
131#define SSACD_SCDB (1 << 3) /* SSPSYSCLK Divider Bypass */
132#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */
133#define SSACD_ACDS(x) ((x) << 0) /* Audio clock divider select */
134#define SSACD_SCDX8 (1 << 7) /* SYSCLK division ratio select */
135
136enum pxa_ssp_type {
137 SSP_UNDEFINED = 0,
138 PXA25x_SSP, /* pxa 210, 250, 255, 26x */
139 PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
140 PXA27x_SSP,
141 PXA168_SSP,
142};
143
144struct ssp_device {
145 struct platform_device *pdev;
146 struct list_head node;
147
148 struct clk *clk;
149 void __iomem *mmio_base;
150 unsigned long phys_base;
151
152 const char *label;
153 int port_id;
154 int type;
155 int use_count;
156 int irq;
157 int drcmr_rx;
158 int drcmr_tx;
159};
160
161/**
162 * pxa_ssp_write_reg - Write to a SSP register
163 *
164 * @dev: SSP device to access
165 * @reg: Register to write to
166 * @val: Value to be written.
167 */
168static inline void pxa_ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val)
169{
170 __raw_writel(val, dev->mmio_base + reg);
171}
172
173/**
174 * pxa_ssp_read_reg - Read from a SSP register
175 *
176 * @dev: SSP device to access
177 * @reg: Register to read from
178 */
179static inline u32 pxa_ssp_read_reg(struct ssp_device *dev, u32 reg)
180{
181 return __raw_readl(dev->mmio_base + reg);
182}
183
184struct ssp_device *pxa_ssp_request(int port, const char *label);
185void pxa_ssp_free(struct ssp_device *);
186#endif /* __ASM_ARCH_SSP_H */
diff --git a/arch/arm/plat-pxa/ssp.c b/arch/arm/plat-pxa/ssp.c
index c6357e554aba..58b79809d20c 100644
--- a/arch/arm/plat-pxa/ssp.c
+++ b/arch/arm/plat-pxa/ssp.c
@@ -28,11 +28,11 @@
28#include <linux/clk.h> 28#include <linux/clk.h>
29#include <linux/err.h> 29#include <linux/err.h>
30#include <linux/platform_device.h> 30#include <linux/platform_device.h>
31#include <linux/spi/pxa2xx_spi.h>
31#include <linux/io.h> 32#include <linux/io.h>
32 33
33#include <asm/irq.h> 34#include <asm/irq.h>
34#include <mach/hardware.h> 35#include <mach/hardware.h>
35#include <plat/ssp.h>
36 36
37static DEFINE_MUTEX(ssp_lock); 37static DEFINE_MUTEX(ssp_lock);
38static LIST_HEAD(ssp_list); 38static LIST_HEAD(ssp_list);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 13:14:14 -0500