[PATCH 7/9] powerpc: BestcComm GenBD task support
Sylvain Munaut
tnt at 246tNt.com
Sun May 13 06:31:55 EST 2007
This is the microcode for the GenBD task and the associated
support code. This is a generic task that copy data to/from
a hardware FIFO. This is currently locked to 32bits wide
access but could be extended as needed.
The microcode itself comes directly from the offical
API (v2.2)
Signed-off-by: Sylvain Munaut <tnt at 246tNt.com>
---
arch/powerpc/sysdev/bestcomm/Kconfig | 7 +
arch/powerpc/sysdev/bestcomm/Makefile | 2 +
arch/powerpc/sysdev/bestcomm/bcom_gen_bd_rx_task.c | 62 +++++
arch/powerpc/sysdev/bestcomm/bcom_gen_bd_tx_task.c | 68 +++++
arch/powerpc/sysdev/bestcomm/gen_bd.c | 261 ++++++++++++++++++++
arch/powerpc/sysdev/bestcomm/gen_bd.h | 48 ++++
6 files changed, 448 insertions(+), 0 deletions(-)
create mode 100644 arch/powerpc/sysdev/bestcomm/bcom_gen_bd_rx_task.c
create mode 100644 arch/powerpc/sysdev/bestcomm/bcom_gen_bd_tx_task.c
create mode 100644 arch/powerpc/sysdev/bestcomm/gen_bd.c
create mode 100644 arch/powerpc/sysdev/bestcomm/gen_bd.h
diff --git a/arch/powerpc/sysdev/bestcomm/Kconfig b/arch/powerpc/sysdev/bestcomm/Kconfig
index 831763b..57cc565 100644
--- a/arch/powerpc/sysdev/bestcomm/Kconfig
+++ b/arch/powerpc/sysdev/bestcomm/Kconfig
@@ -30,3 +30,10 @@ config PPC_BESTCOMM_FEC
help
This option enables the support for the FEC tasks.
+config PPC_BESTCOMM_GEN_BD
+ tristate "Bestcomm GenBD tasks support"
+ depends on PPC_BESTCOMM
+ default n
+ help
+ This option enables the support for the GenBD tasks.
+
diff --git a/arch/powerpc/sysdev/bestcomm/Makefile b/arch/powerpc/sysdev/bestcomm/Makefile
index 537d174..aed2df2 100644
--- a/arch/powerpc/sysdev/bestcomm/Makefile
+++ b/arch/powerpc/sysdev/bestcomm/Makefile
@@ -5,8 +5,10 @@
bestcomm-core-objs := bestcomm.o sram.o
bestcomm-ata-objs := ata.o bcom_ata_task.o
bestcomm-fec-objs := fec.o bcom_fec_rx_task.o bcom_fec_tx_task.o
+bestcomm-gen-bd-objs := gen_bd.o bcom_gen_bd_rx_task.o bcom_gen_bd_tx_task.o
obj-$(CONFIG_PPC_BESTCOMM) += bestcomm-core.o
obj-$(CONFIG_PPC_BESTCOMM_ATA) += bestcomm-ata.o
obj-$(CONFIG_PPC_BESTCOMM_FEC) += bestcomm-fec.o
+obj-$(CONFIG_PPC_BESTCOMM_GEN_BD) += bestcomm-gen-bd.o
diff --git a/arch/powerpc/sysdev/bestcomm/bcom_gen_bd_rx_task.c b/arch/powerpc/sysdev/bestcomm/bcom_gen_bd_rx_task.c
new file mode 100644
index 0000000..f356886
--- /dev/null
+++ b/arch/powerpc/sysdev/bestcomm/bcom_gen_bd_rx_task.c
@@ -0,0 +1,62 @@
+/*
+ * Bestcomm GenBD RX task microcode
+ *
+ * Copyright (C) 2006 AppSpec Computer Technologies Corp.
+ * Jeff Gibbons <jeff.gibbons at appspec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * Based on BestCommAPI-2.2/code_dma/image_rtos1/dma_image.hex
+ * on Tue Mar 4 10:14:12 2006 GMT
+ *
+ */
+
+#include <asm/types.h>
+
+/*
+ * The header consists of the following fields:
+ * u32 magic;
+ * u8 desc_size;
+ * u8 var_size;
+ * u8 inc_size;
+ * u8 first_var;
+ * u8 reserved[8];
+ *
+ * The size fields contain the number of 32-bit words.
+ */
+
+u32 bcom_gen_bd_rx_task[] = {
+ /* header */
+ 0x4243544b,
+ 0x0d020409,
+ 0x00000000,
+ 0x00000000,
+
+ /* Task descriptors */
+ 0x808220da, /* LCD: idx0 = var1, idx1 = var4; idx1 <= var3; idx0 += inc3, idx1 += inc2 */
+ 0x13e01010, /* DRD1A: var4 = var2; FN=0 MORE init=31 WS=0 RS=0 */
+ 0xb880025b, /* LCD: idx2 = *idx1, idx3 = var0; idx2 < var9; idx2 += inc3, idx3 += inc3 */
+ 0x10001308, /* DRD1A: var4 = idx1; FN=0 MORE init=0 WS=0 RS=0 */
+ 0x60140002, /* DRD2A: EU0=0 EU1=0 EU2=0 EU3=2 EXT init=0 WS=2 RS=2 */
+ 0x0cccfcca, /* DRD2B1: *idx3 = EU3(); EU3(*idx3,var10) */
+ 0xd9190240, /* LCDEXT: idx2 = idx2; idx2 > var9; idx2 += inc0 */
+ 0xb8c5e009, /* LCD: idx3 = *(idx1 + var00000015); ; idx3 += inc1 */
+ 0x07fecf80, /* DRD1A: *idx3 = *idx0; FN=0 INT init=31 WS=3 RS=3 */
+ 0x99190024, /* LCD: idx2 = idx2; idx2 once var0; idx2 += inc4 */
+ 0x60000005, /* DRD2A: EU0=0 EU1=0 EU2=0 EU3=5 EXT init=0 WS=0 RS=0 */
+ 0x0c4cf889, /* DRD2B1: *idx1 = EU3(); EU3(idx2,var9) */
+ 0x000001f8, /* NOP */
+
+ /* VAR[9]-VAR[10] */
+ 0x40000000,
+ 0x7fff7fff,
+
+ /* INC[0]-INC[3] */
+ 0x40000000,
+ 0xe0000000,
+ 0xa0000008,
+ 0x20000000,
+};
+
diff --git a/arch/powerpc/sysdev/bestcomm/bcom_gen_bd_tx_task.c b/arch/powerpc/sysdev/bestcomm/bcom_gen_bd_tx_task.c
new file mode 100644
index 0000000..7460c39
--- /dev/null
+++ b/arch/powerpc/sysdev/bestcomm/bcom_gen_bd_tx_task.c
@@ -0,0 +1,68 @@
+/*
+ * Bestcomm GenBD TX task microcode
+ *
+ * Copyright (C) 2006 AppSpec Computer Technologies Corp.
+ * Jeff Gibbons <jeff.gibbons at appspec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * Based on BestCommAPI-2.2/code_dma/image_rtos1/dma_image.hex
+ * on Tue Mar 4 10:14:12 2006 GMT
+ *
+ */
+
+#include <asm/types.h>
+
+/*
+ * The header consists of the following fields:
+ * u32 magic;
+ * u8 desc_size;
+ * u8 var_size;
+ * u8 inc_size;
+ * u8 first_var;
+ * u8 reserved[8];
+ *
+ * The size fields contain the number of 32-bit words.
+ */
+
+u32 bcom_gen_bd_tx_task[] = {
+ /* header */
+ 0x4243544b,
+ 0x0f040609,
+ 0x00000000,
+ 0x00000000,
+
+ /* Task descriptors */
+ 0x800220e3, /* LCD: idx0 = var0, idx1 = var4; idx1 <= var3; idx0 += inc4, idx1 += inc3 */
+ 0x13e01010, /* DRD1A: var4 = var2; FN=0 MORE init=31 WS=0 RS=0 */
+ 0xb8808264, /* LCD: idx2 = *idx1, idx3 = var1; idx2 < var9; idx2 += inc4, idx3 += inc4 */
+ 0x10001308, /* DRD1A: var4 = idx1; FN=0 MORE init=0 WS=0 RS=0 */
+ 0x60140002, /* DRD2A: EU0=0 EU1=0 EU2=0 EU3=2 EXT init=0 WS=2 RS=2 */
+ 0x0cccfcca, /* DRD2B1: *idx3 = EU3(); EU3(*idx3,var10) */
+ 0xd9190300, /* LCDEXT: idx2 = idx2; idx2 > var12; idx2 += inc0 */
+ 0xb8c5e009, /* LCD: idx3 = *(idx1 + var00000015); ; idx3 += inc1 */
+ 0x03fec398, /* DRD1A: *idx0 = *idx3; FN=0 init=31 WS=3 RS=3 */
+ 0x9919826a, /* LCD: idx2 = idx2, idx3 = idx3; idx2 > var9; idx2 += inc5, idx3 += inc2 */
+ 0x0feac398, /* DRD1A: *idx0 = *idx3; FN=0 TFD INT init=31 WS=1 RS=1 */
+ 0x99190036, /* LCD: idx2 = idx2; idx2 once var0; idx2 += inc6 */
+ 0x60000005, /* DRD2A: EU0=0 EU1=0 EU2=0 EU3=5 EXT init=0 WS=0 RS=0 */
+ 0x0c4cf889, /* DRD2B1: *idx1 = EU3(); EU3(idx2,var9) */
+ 0x000001f8, /* NOP */
+
+ /* VAR[9]-VAR[12] */
+ 0x40000000,
+ 0x7fff7fff,
+ 0x00000000,
+ 0x40000004,
+
+ /* INC[0]-INC[5] */
+ 0x40000000,
+ 0xe0000000,
+ 0xe0000000,
+ 0xa0000008,
+ 0x20000000,
+ 0x4000ffff,
+};
+
diff --git a/arch/powerpc/sysdev/bestcomm/gen_bd.c b/arch/powerpc/sysdev/bestcomm/gen_bd.c
new file mode 100644
index 0000000..b221bbc
--- /dev/null
+++ b/arch/powerpc/sysdev/bestcomm/gen_bd.c
@@ -0,0 +1,261 @@
+/*
+ * Driver for MPC52xx processor BestComm General Buffer Descriptor
+ *
+ * Copyright (C) 2007 Sylvain Munaut <tnt at 246tNt.com>
+ * Copyright (C) 2006 AppSpec Computer Technologies Corp.
+ * Jeff Gibbons <jeff.gibbons at appspec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+
+#include <asm/mpc52xx.h>
+
+#include "bestcomm.h"
+#include "bestcomm_priv.h"
+#include "gen_bd.h"
+
+
+/* ======================================================================== */
+/* Task image/var/inc */
+/* ======================================================================== */
+
+/* gen_bd tasks images */
+extern u32 bcom_gen_bd_rx_task[];
+extern u32 bcom_gen_bd_tx_task[];
+
+/* rx task vars that need to be set before enabling the task */
+struct bcom_gen_bd_rx_var {
+ u32 enable; /* (u16*) address of task's control register */
+ u32 fifo; /* (u32*) address of gen_bd's fifo */
+ u32 bd_base; /* (struct bcom_bd*) beginning of ring buffer */
+ u32 bd_last; /* (struct bcom_bd*) end of ring buffer */
+ u32 bd_start; /* (struct bcom_bd*) current bd */
+ u32 buffer_size; /* size of receive buffer */
+};
+
+/* rx task incs that need to be set before enabling the task */
+struct bcom_gen_bd_rx_inc {
+ u16 pad0;
+ s16 incr_bytes;
+ u16 pad1;
+ s16 incr_dst;
+};
+
+/* tx task vars that need to be set before enabling the task */
+struct bcom_gen_bd_tx_var {
+ u32 fifo; /* (u32*) address of gen_bd's fifo */
+ u32 enable; /* (u16*) address of task's control register */
+ u32 bd_base; /* (struct bcom_bd*) beginning of ring buffer */
+ u32 bd_last; /* (struct bcom_bd*) end of ring buffer */
+ u32 bd_start; /* (struct bcom_bd*) current bd */
+ u32 buffer_size; /* set by uCode for each packet */
+};
+
+/* tx task incs that need to be set before enabling the task */
+struct bcom_gen_bd_tx_inc {
+ u16 pad0;
+ s16 incr_bytes;
+ u16 pad1;
+ s16 incr_src;
+ u16 pad2;
+ s16 incr_src_ma;
+};
+
+/* private structure */
+struct bcom_gen_bd_priv {
+ phys_addr_t fifo;
+ int initiator;
+ int ipr;
+ int maxbufsize;
+};
+
+
+/* ======================================================================== */
+/* Task support code */
+/* ======================================================================== */
+
+struct bcom_task *
+bcom_gen_bd_rx_init(int queue_len, phys_addr_t fifo,
+ int initiator, int ipr, int maxbufsize)
+{
+ struct bcom_task *tsk;
+ struct bcom_gen_bd_priv *priv;
+
+ tsk = bcom_task_alloc(queue_len, sizeof(struct bcom_gen_bd),
+ sizeof(struct bcom_gen_bd_priv));
+ if (!tsk)
+ return NULL;
+
+ tsk->flags = BCOM_FLAGS_NONE;
+
+ priv = tsk->priv;
+ priv->fifo = fifo;
+ priv->initiator = initiator;
+ priv->ipr = ipr;
+ priv->maxbufsize = maxbufsize;
+
+ if (bcom_gen_bd_rx_reset(tsk)) {
+ bcom_task_release(tsk);
+ return NULL;
+ }
+
+ return tsk;
+}
+
+int
+bcom_gen_bd_rx_reset(struct bcom_task *tsk)
+{
+ struct bcom_gen_bd_priv *priv = tsk->priv;
+ struct bcom_gen_bd_rx_var *var;
+ struct bcom_gen_bd_rx_inc *inc;
+
+ /* Shutdown the task */
+ bcom_disable_task(tsk->tasknum);
+
+ /* Reset the microcode */
+ var = (struct bcom_gen_bd_rx_var *) bcom_task_var(tsk->tasknum);
+ inc = (struct bcom_gen_bd_rx_inc *) bcom_task_inc(tsk->tasknum);
+
+ if (bcom_load_image(tsk->tasknum, bcom_gen_bd_rx_task))
+ return -1;
+
+ var->enable = bcom->regs_base +
+ offsetof(struct mpc52xx_sdma, tcr[tsk->tasknum]);
+ var->fifo = (u32) priv->fifo;
+ var->bd_base = tsk->bd_pa;
+ var->bd_last = tsk->bd_pa + ((tsk->num_bd-1) * tsk->bd_size);
+ var->bd_start = tsk->bd_pa;
+ var->buffer_size = priv->maxbufsize;
+
+ inc->incr_bytes = -(s16)sizeof(u32);
+ inc->incr_dst = sizeof(u32);
+
+ /* Reset the BDs */
+ tsk->index = 0;
+ tsk->outdex = 0;
+
+ memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
+
+ /* Configure some stuff */
+ bcom_set_task_pragma(tsk->tasknum, BCOM_GEN_RX_BD_PRAGMA);
+ bcom_set_task_auto_start(tsk->tasknum, tsk->tasknum);
+
+ out_8(&bcom->regs->ipr[priv->initiator], priv->ipr);
+ bcom_set_initiator(tsk->tasknum, priv->initiator);
+
+ out_be32(&bcom->regs->IntPend, 1<<tsk->tasknum); /* Clear ints */
+
+ return 0;
+}
+
+void
+bcom_gen_bd_rx_release(struct bcom_task *tsk)
+{
+ /* Nothing special for the GenBD tasks */
+ bcom_task_release(tsk);
+}
+
+
+extern struct bcom_task *
+bcom_gen_bd_tx_init(int queue_len, phys_addr_t fifo,
+ int initiator, int ipr)
+{
+ struct bcom_task *tsk;
+ struct bcom_gen_bd_priv *priv;
+
+ tsk = bcom_task_alloc(queue_len, sizeof(struct bcom_gen_bd),
+ sizeof(struct bcom_gen_bd_priv));
+ if (!tsk)
+ return NULL;
+
+ tsk->flags = BCOM_FLAGS_NONE;
+
+ priv = tsk->priv;
+ priv->fifo = fifo;
+ priv->initiator = initiator;
+ priv->ipr = ipr;
+
+ if (bcom_gen_bd_tx_reset(tsk)) {
+ bcom_task_release(tsk);
+ return NULL;
+ }
+
+ return tsk;
+}
+
+int
+bcom_gen_bd_tx_reset(struct bcom_task *tsk)
+{
+ struct bcom_gen_bd_priv *priv = tsk->priv;
+ struct bcom_gen_bd_tx_var *var;
+ struct bcom_gen_bd_tx_inc *inc;
+
+ /* Shutdown the task */
+ bcom_disable_task(tsk->tasknum);
+
+ /* Reset the microcode */
+ var = (struct bcom_gen_bd_tx_var *) bcom_task_var(tsk->tasknum);
+ inc = (struct bcom_gen_bd_tx_inc *) bcom_task_inc(tsk->tasknum);
+
+ if (bcom_load_image(tsk->tasknum, bcom_gen_bd_tx_task))
+ return -1;
+
+ var->enable = bcom->regs_base +
+ offsetof(struct mpc52xx_sdma, tcr[tsk->tasknum]);
+ var->fifo = (u32) priv->fifo;
+ var->bd_base = tsk->bd_pa;
+ var->bd_last = tsk->bd_pa + ((tsk->num_bd-1) * tsk->bd_size);
+ var->bd_start = tsk->bd_pa;
+
+ inc->incr_bytes = -(s16)sizeof(u32);
+ inc->incr_src = sizeof(u32);
+ inc->incr_src_ma = sizeof(u8);
+
+ /* Reset the BDs */
+ tsk->index = 0;
+ tsk->outdex = 0;
+
+ memset(tsk->bd, 0x00, tsk->num_bd * tsk->bd_size);
+
+ /* Configure some stuff */
+ bcom_set_task_pragma(tsk->tasknum, BCOM_GEN_TX_BD_PRAGMA);
+ bcom_set_task_auto_start(tsk->tasknum, tsk->tasknum);
+
+ out_8(&bcom->regs->ipr[priv->initiator], priv->ipr);
+ bcom_set_initiator(tsk->tasknum, priv->initiator);
+
+ out_be32(&bcom->regs->IntPend, 1<<tsk->tasknum); /* Clear ints */
+
+ return 0;
+}
+
+void
+bcom_gen_bd_tx_release(struct bcom_task *tsk)
+{
+ /* Nothing special for the GenBD tasks */
+ bcom_task_release(tsk);
+}
+
+
+EXPORT_SYMBOL(bcom_gen_bd_rx_init);
+EXPORT_SYMBOL(bcom_gen_bd_rx_reset);
+EXPORT_SYMBOL(bcom_gen_bd_rx_release);
+EXPORT_SYMBOL(bcom_gen_bd_tx_init);
+EXPORT_SYMBOL(bcom_gen_bd_tx_reset);
+EXPORT_SYMBOL(bcom_gen_bd_tx_release);
+
+MODULE_DESCRIPTION("BestComm General Buffer Descriptor tasks driver");
+MODULE_AUTHOR("Jeff Gibbons <jeff.gibbons at appspec.com>");
+MODULE_LICENSE("GPL v2");
+
diff --git a/arch/powerpc/sysdev/bestcomm/gen_bd.h b/arch/powerpc/sysdev/bestcomm/gen_bd.h
new file mode 100644
index 0000000..5b6fa80
--- /dev/null
+++ b/arch/powerpc/sysdev/bestcomm/gen_bd.h
@@ -0,0 +1,48 @@
+/*
+ * Header for Bestcomm General Buffer Descriptor tasks driver
+ *
+ *
+ * Copyright (C) 2007 Sylvain Munaut <tnt at 246tNt.com>
+ * Copyright (C) 2006 AppSpec Computer Technologies Corp.
+ * Jeff Gibbons <jeff.gibbons at appspec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ *
+ */
+
+#ifndef __BESTCOMM_GEN_BD_H__
+#define __BESTCOMM_GEN_BD_H__
+
+struct bcom_gen_bd {
+ u32 status;
+ u32 buf_pa;
+};
+
+
+extern struct bcom_task *
+bcom_gen_bd_rx_init(int queue_len, phys_addr_t fifo,
+ int initiator, int ipr, int maxbufsize);
+
+extern int
+bcom_gen_bd_rx_reset(struct bcom_task *tsk);
+
+extern void
+bcom_gen_bd_rx_release(struct bcom_task *tsk);
+
+
+extern struct bcom_task *
+bcom_gen_bd_tx_init(int queue_len, phys_addr_t fifo,
+ int initiator, int ipr);
+
+extern int
+bcom_gen_bd_tx_reset(struct bcom_task *tsk);
+
+extern void
+bcom_gen_bd_tx_release(struct bcom_task *tsk);
+
+
+#endif /* __BESTCOMM_GEN_BD_H__ */
+
--
1.5.1.2
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